Oracle PL/SQL/PL SQL/Update Data — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
Admin (обсуждение | вклад) м (1 версия) |
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Текущая версия на 09:59, 26 мая 2010
Содержание
- 1 Ajust price based on price range
- 2 Bundle several update and insert statements into one procedure
- 3 Change price and output the result
- 4 Check row count being updating
- 5 Check SQL%ROWCOUNT after updating
- 6 Decrease salary with user procedure
- 7 Exception handling for update statement
- 8 Run an anonymous block that updates the number of book IN STOCK
- 9 Run an anonymous block that updates the number of pages for this book
- 10 Run the anonymous block to update the position column
- 11 Select for update
- 12 Two UPDATE statements.
- 13 Update salary with stored procedure
- 14 UPDATE statement can be used within PL/SQL programs to update a row or a set of rows
- 15 Update table and return if success
- 16 Update with variable
- 17 Use procedure to update table
Ajust price based on price range
SQL>
SQL> CREATE TABLE books (
2 isbn CHAR(10) PRIMARY KEY,
3 category VARCHAR2(20),
4 title VARCHAR2(100),
5 num_pages NUMBER,
6 price NUMBER,
7 copyright NUMBER(4),
8 emp1 NUMBER,
9 emp2 NUMBER,
10 emp3 NUMBER
11 );
Table created.
SQL>
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("1", "Database", "Oracle", 563, 39.99, 2009, 1, 2, 3);
1 row created.
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2)
2 VALUES ("2", "Database", "MySQL", 765, 44.99, 2009, 4, 5);
1 row created.
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("3", "Database", "SQL Server", 404, 39.99, 2001, 6, 7, 8);
1 row created.
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("4", "Database", "SQL", 535, 39.99, 2002, 4, 5, 9);
1 row created.
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2)
2 VALUES ("5", "Database", "Java", 487, 39.99, 2002, 10, 11);
1 row created.
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2)
2 VALUES ("6", "Database", "JDBC", 592, 39.99, 2002, 12, 13);
1 row created.
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("7", "Database", "XML", 500, 39.99, 2002, 1, 2, 3);
1 row created.
SQL>
SQL>
SQL> DECLARE
2 v_price books.price%TYPE;
3 v_isbn books.isbn%TYPE := "3";
4 BEGIN
5 SELECT price INTO v_price FROM books WHERE isbn = v_isbn;
6
7 DBMS_OUTPUT.PUT_LINE("Starting price: "||v_price);
8
9 IF v_price < 40
10 THEN
11 DBMS_OUTPUT.PUT_LINE("This book is already discounted");
12 ELSIF v_price BETWEEN 40 AND 50
13 THEN
14 v_price := v_price - (v_price * .10);
15 UPDATE books SET price = v_price WHERE isbn = v_isbn;
16 ELSIF v_price > 50
17 THEN
18 v_price := v_price - (v_price * .10);
19 UPDATE books SET price = v_price WHERE isbn = v_isbn;
20 END IF;
21
22 DBMS_OUTPUT.PUT_LINE("Ending price: "||v_price);
23
24 ROLLBACK;
25 EXCEPTION
26 WHEN OTHERS
27 THEN
28 DBMS_OUTPUT.PUT_LINE(SQLERRM);
29 ROLLBACK;
30 END;
31 /
Starting price: 39.99
This book is already discounted
Ending price: 39.99
PL/SQL procedure successfully completed.
SQL> drop table books;
Table dropped.
SQL>
Bundle several update and insert statements into one procedure
SQL> CREATE TABLE EMP(
2 EMPNO NUMBER(4) NOT NULL,
3 ENAME VARCHAR2(10),
4 JOB VARCHAR2(9),
5 MGR NUMBER(4),
6 HIREDATE DATE,
7 SAL NUMBER(7, 2),
8 COMM NUMBER(7, 2),
9 DEPTNO NUMBER(2)
10 );
Table created.
SQL> INSERT INTO EMP VALUES(2, "Jack", "Tester", 6,TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(3, "Wil", "Tester", 6,TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(4, "Jane", "Designer", 9,TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(5, "Mary", "Tester", 6,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(6, "Black", "Designer", 9,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7, "Chris", "Designer", 9,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(8, "Smart", "Helper", 4,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(9, "Peter", "Manager", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(10, "Take", "Tester", 6,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(13, "Fake", "Helper", 4,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL>
SQL> CREATE TABLE DEPT(
2 DEPTNO NUMBER(2),
3 DNAME VARCHAR2(14),
4 LOC VARCHAR2(13)
5 );
Table created.
SQL>
SQL> INSERT INTO DEPT VALUES (10, "ACCOUNTING", "NEW YORK");
1 row created.
SQL> INSERT INTO DEPT VALUES (20, "RESEARCH", "DALLAS");
1 row created.
SQL> INSERT INTO DEPT VALUES (30, "SALES", "CHICAGO");
1 row created.
SQL> INSERT INTO DEPT VALUES (40, "OPERATIONS", "BOSTON");
1 row created.
SQL>
SQL> alter table dept add tot_sal number;
Table altered.
SQL>
SQL> update dept set tot_sal = ( select sum(sal) from emp where deptno = dept.deptno );
4 rows updated.
SQL>
SQL> create table EMP_AUDIT (date_rec date, empno number, sal number(4));
Table created.
SQL>
SQL> insert into emp_deltas select empno, null from emp;
10 rows created.
SQL>
SQL> create or replace procedure UPDATE_EMP(id number, p_sal number) is
2 begin
3 update DEPT set TOT_SAL = TOT_SAL + ( select p_sal-sal from EMP where empno = id );
4
5 update EMP set sal = p_sal where empno = id;
6
7 update EMP_DELTAS set change_type = "SAL" where empno = id;
8
9 insert into EMP_AUDIT values (sysdate,id,p_sal);
10
11 exception
12 when others then
13 rollback;
14 raise;
15 end;
16 /
Procedure created.
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL> drop table dept;
Table dropped.
Change price and output the result
SQL> CREATE TABLE books (
2 isbn CHAR(10) PRIMARY KEY,
3 category VARCHAR2(20),
4 title VARCHAR2(100),
5 num_pages NUMBER,
6 price NUMBER,
7 copyright NUMBER(4),
8 emp1 NUMBER,
9 emp2 NUMBER,
10 emp3 NUMBER
11 );
Table created.
SQL>
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("1", "Database", "Oracle", 563, 39.99, 2009, 1, 2, 3);
1 row created.
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2)
2 VALUES ("2", "Database", "MySQL", 765, 44.99, 2009, 4, 5);
1 row created.
SQL> INSERT INTO books (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("3", "Database", "SQL Server", 404, 39.99, 2001, 6, 7, 8);
1 row created.
SQL>
SQL> SET SERVEROUTPUT ON ESCAPE OFF
SQL>
SQL> DECLARE
2 v_price BOOKS.PRICE%TYPE;
3 BEGIN
4
5 SELECT price INTO v_price FROM books WHERE isbn = "3";
6
7 DBMS_OUTPUT.PUT_LINE("The original price for isbn 3 was: "||v_price);
8
9 v_price := v_price * .9;
10
11 UPDATE books SET price = v_price WHERE isbn = "3";
12
13 DBMS_OUTPUT.PUT_LINE(CHR(0));
14 DBMS_OUTPUT.PUT_LINE("The discounted price for isbn 3 is: "||v_price);
15
16 EXCEPTION
17 WHEN OTHERS
18 THEN DBMS_OUTPUT.PUT_LINE (SQLERRM);
19 END;
20 /
The original price for isbn 3 was: 39.99
The discounted price for isbn 3 is: 35.991
PL/SQL procedure successfully completed.
SQL> drop table books;
Table dropped.
SQL>
Check row count being updating
SQL>
SQL>
SQL>
SQL> CREATE TABLE departments
2 (department_id number(10) not null,
3 department_name varchar2(50) not null,
4 CONSTRAINT departments_pk PRIMARY KEY (department_id)
5 );
Table created.
SQL>
SQL>
SQL>
SQL> insert into departments ( department_id, department_name )
2 values( 1, "Data Group" );
1 row created.
SQL>
SQL> insert into departments ( department_id, department_name )
2 values( 2, "Purchasing" );
1 row created.
SQL>
SQL> insert into departments ( department_id, department_name )
2 values( 3, "Call Center" );
1 row created.
SQL>
SQL> insert into departments ( department_id, department_name )
2 values( 4, "Communication" );
1 row created.
SQL>
SQL>
SQL> declare
2 begin
3 update departments
4 set department_name = department_name
5 where 1 = 2;
6
7 dbms_output.put ("An update with a WHERE clause 1 = 2 effects ");
8 dbms_output.put_line(sql%rowcount || " records.");
9
10 update departments
11 set department_name = department_name;
12
13 dbms_output.put("No WHERE clause in an update effects ");
14 dbms_output.put_line(sql%rowcount || " records.");
15 end;
16 /
An update with a WHERE clause 1 = 2 effects 0 records.
No WHERE clause in an update effects 4 records.
PL/SQL procedure successfully completed.
SQL>
SQL> drop table departments;
Table dropped.
SQL>
Check SQL%ROWCOUNT after updating
SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
2 ENAME VARCHAR2(10),
3 JOB VARCHAR2(9),
4 MGR NUMBER(4),
5 HIREDATE DATE,
6 SAL NUMBER(7, 2),
7 COMM NUMBER(7, 2),
8 DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, "SMITH", "CLERK", 7902, TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, "ALLEN", "SALESMAN", 7698, TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, "WARD", "SALESMAN", 7698, TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, "JONES", "MANAGER", 7839, TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), null, NULL, 10);
1 row created.
SQL>
SQL> select sal from emp;
SAL
----------
800
1600
1250
2975
1250
2850
2450
3000
5000
1500
1100
SAL
----------
950
3000
14 rows selected.
SQL>
SQL> BEGIN
2 UPDATE emp
3 SET sal = nvl(sal, 0) * 1.10;
4 DBMS_OUTPUT.PUT_LINE("Number of Rows Updated: " ||
5 SQL%ROWCOUNT);
6 END;
7 /
Number of Rows Updated: 14
PL/SQL procedure successfully completed.
SQL>
SQL> drop table emp;
Table dropped.
SQL>
SQL>
SQL>
SQL>
SQL>
Decrease salary with user procedure
SQL> CREATE TABLE EMP(
2 EMPNO NUMBER(4) NOT NULL,
3 ENAME VARCHAR2(10),
4 JOB VARCHAR2(9),
5 MGR NUMBER(4),
6 HIREDATE DATE,
7 SAL NUMBER(7, 2),
8 COMM NUMBER(7, 2),
9 DEPTNO NUMBER(2)
10 );
Table created.
SQL> INSERT INTO EMP VALUES(2, "Jack", "Tester", 6,TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(3, "Wil", "Tester", 6,TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(4, "Jane", "Designer", 9,TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(5, "Mary", "Tester", 6,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7, "Chris", "Designer", 9,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(8, "Smart", "Helper", 4,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(9, "Peter", "Manager", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(10, "Take", "Tester", 6,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL>
SQL> select * from emp;
Enter...
2 Jack Tester 6 20-02-1981 1600 300 30
3 Wil Tester 6 22-02-1981 1250 500 30
4 Jane Designer 9 02-04-1981 2975 [N/A] 20
5 Mary Tester 6 28-09-1981 1250 1400 30
7 Chris Designer 9 09-06-1981 2450 [N/A] 10
8 Smart Helper 4 09-12-1982 3000 [N/A] 20
9 Peter Manager [N/A] 17-11-1981 5000 [N/A] 10
10 Take Tester 6 08-09-1981 1500 0 30
13 Fake Helper 4 03-12-1981 3000 [N/A] 20
9 rows selected.
SQL> create or replace
2 procedure UPDATE_EMP(p_empno number, p_decrease number) is
3 begin
4 update EMP
5 set SAL = SAL / p_decrease
6 where empno = p_empno;
7 end;
8 /
Procedure created.
SQL> exec UPDATE_EMP(1,2);
PL/SQL procedure successfully completed.
SQL> exec UPDATE_EMP(1,0);
PL/SQL procedure successfully completed.
SQL>
SQL> select * from emp;
Enter...
2 Jack Tester 6 20-02-1981 1600 300 30
3 Wil Tester 6 22-02-1981 1250 500 30
4 Jane Designer 9 02-04-1981 2975 [N/A] 20
5 Mary Tester 6 28-09-1981 1250 1400 30
7 Chris Designer 9 09-06-1981 2450 [N/A] 10
8 Smart Helper 4 09-12-1982 3000 [N/A] 20
9 Peter Manager [N/A] 17-11-1981 5000 [N/A] 10
10 Take Tester 6 08-09-1981 1500 0 30
13 Fake Helper 4 03-12-1981 3000 [N/A] 20
9 rows selected.
SQL> drop table emp;
Table dropped.
Exception handling for update statement
SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
2 ENAME VARCHAR2(10),
3 JOB VARCHAR2(9),
4 MGR NUMBER(4),
5 HIREDATE DATE,
6 SAL NUMBER(7, 2),
7 COMM NUMBER(7, 2),
8 DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, "SMITH", "CLERK", 7902, TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, "ALLEN", "SALESMAN", 7698, TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, "WARD", "SALESMAN", 7698, TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, "JONES", "MANAGER", 7839, TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), 1300, NULL, 10);
1 row created.
SQL>
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 800 20
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7566 JONES MANAGER 7839 02-APR-81 2975 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7788 SCOTT ANALYST 7566 09-DEC-82 3000 20
Page 1
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81 5000 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK 7788 12-JAN-83 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7934 MILLER CLERK 7782 23-JAN-82 1300 10
Page 2
14 rows selected.
SQL> BEGIN
2
3 UPDATE emp
4 SET sal= nvl(sal, 0) * 1.10;
5 DBMS_OUTPUT.PUT_LINE("Update Process Succeeded.");
6 EXCEPTION
7 WHEN OTHERS THEN
8
9 DBMS_OUTPUT.PUT_LINE("Update Process Failed.");
10 ROLLBACK;
11 END;
12 /
Update Process Succeeded.
PL/SQL procedure successfully completed.
SQL>
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 880 20
7499 ALLEN SALESMAN 7698 20-FEB-81 1760 300 30
7521 WARD SALESMAN 7698 22-FEB-81 1375 500 30
7566 JONES MANAGER 7839 02-APR-81 3272.5 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1375 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81 3135 30
7782 CLARK MANAGER 7839 09-JUN-81 2695 10
7788 SCOTT ANALYST 7566 09-DEC-82 3300 20
Page 1
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81 5500 10
7844 TURNER SALESMAN 7698 08-SEP-81 1650 0 30
7876 ADAMS CLERK 7788 12-JAN-83 1210 20
7900 JAMES CLERK 7698 03-DEC-81 1045 30
7902 FORD ANALYST 7566 03-DEC-81 3300 20
7934 MILLER CLERK 7782 23-JAN-82 1430 10
Page 2
14 rows selected.
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL>
Run an anonymous block that updates the number of book IN STOCK
SQL> CREATE TABLE book (
2 isbn CHAR(10) PRIMARY KEY,
3 category VARCHAR2(20),
4 title VARCHAR2(100),
5 num_pages NUMBER,
6 price NUMBER,
7 copyright NUMBER(4),
8 emp1 NUMBER,
9 emp2 NUMBER,
10 emp3 NUMBER
11 );
Table created.
SQL>
SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("1", "Database", "Oracle", 563, 39.99, 2009, 1, 2, 3);
1 row created.
SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2)
2 VALUES ("2", "Database", "MySQL", 765, 44.99, 2009, 4, 5);
1 row created.
SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("3", "Database", "SQL Server", 404, 39.99, 2001, 6, 7, 8);
1 row created.
SQL>
SQL> CREATE TABLE inventory (
2 isbn CHAR(10),
3 status VARCHAR2(25) CHECK (status IN ("IN STOCK", "BACKORDERED", "FUTURE")),
4 status_date DATE,
5 amount NUMBER
6 );
SQL>
SQL> INSERT INTO inventory (isbn, status, status_date, amount)VALUES ("1", "BACKORDERED", TO_DATE("06-JUN-2004", "DD-MON-YYYY"), 1000);
SQL> INSERT INTO inventory (isbn, status, status_date, amount)VALUES ("2", "IN STOCK", NULL, 5000);
SQL> INSERT INTO inventory (isbn, status, status_date, amount)VALUES ("3", "IN STOCK", NULL, 1000);
SQL>
SQL>
SQL> DECLARE
2
3 v_isbn INVENTORY.ISBN%TYPE;
4 v_amount INVENTORY.AMOUNT%TYPE;
5
6 CURSOR inventory_cur IS SELECT isbn, amount FROM inventory
7 WHERE status = "IN STOCK"
8 AND isbn IN (SELECT isbn FROM book)
9 FOR UPDATE OF amount;
10
11 BEGIN
12
13 FOR y IN inventory_cur
14 LOOP
15 FETCH inventory_cur INTO v_isbn, v_amount;
16 EXIT WHEN inventory_cur%NOTFOUND;
17
18 DBMS_OUTPUT.PUT_LINE(v_isbn||"Amount IN STOCK before: "||v_amount);
19
20 v_amount := v_amount + 50;
21
22 UPDATE inventory SET amount = v_amount WHERE CURRENT OF inventory_cur;
23
24 DBMS_OUTPUT.PUT_LINE(v_isbn||"Amount IN STOCK after: "||v_amount);
25
26 END LOOP;
27
28 COMMIT;
29
30 EXCEPTION
31 WHEN OTHERS
32 THEN
33 DBMS_OUTPUT.PUT_LINE(SQLERRM);
34 ROLLBACK;
35 END;
36 /
SQL> drop table book;
Table dropped.
Run an anonymous block that updates the number of pages for this book
SQL> CREATE TABLE book (
2 isbn CHAR(10) PRIMARY KEY,
3 category VARCHAR2(20),
4 title VARCHAR2(100),
5 num_pages NUMBER,
6 price NUMBER,
7 copyright NUMBER(4),
8 emp1 NUMBER,
9 emp2 NUMBER,
10 emp3 NUMBER
11 );
Table created.
SQL>
SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("1", "Database", "Oracle", 563, 39.99, 2009, 1, 2, 3);
1 row created.
SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2)
2 VALUES ("2", "Database", "MySQL", 765, 44.99, 2009, 4, 5);
1 row created.
SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
2 VALUES ("3", "Database", "SQL Server", 404, 39.99, 2001, 6, 7, 8);
1 row created.
SQL>
SQL> DECLARE
2
3 v_num_pages book.NUM_PAGES%TYPE;
4 v_isbn book.ISBN%TYPE := "3";
5
6 BEGIN
7
8 SELECT num_pages INTO v_num_pages FROM book WHERE isbn = v_isbn;
9
10 DBMS_OUTPUT.PUT_LINE("Number of pages before: "||v_num_pages);
11
12 v_num_pages := v_num_pages + 200;
13
14 UPDATE book SET num_pages = v_num_pages WHERE isbn = v_isbn;
15
16 DBMS_OUTPUT.PUT_LINE("Number of pages after: "||v_num_pages);
17
18 COMMIT;
19
20 EXCEPTION
21 WHEN OTHERS
22 THEN
23 DBMS_OUTPUT.PUT_LINE(SQLERRM);
24 ROLLBACK;
25 END;
26 /
Number of pages before: 404
Number of pages after: 604
PL/SQL procedure successfully completed.
SQL>
SQL> drop table book;
Table dropped.
Run the anonymous block to update the position column
SQL> CREATE TABLE book (
2 isbn VARCHAR2(10) PRIMARY KEY,
3 parent_isbn VARCHAR2(10),
4 series VARCHAR2(20),
5 category VARCHAR2(20),
6 title VARCHAR2(100),
7 num_pages NUMBER,
8 price NUMBER,
9 copyright NUMBER(4));
SQL>
SQL> INSERT INTO book (isbn, parent_isbn, series, category, title, num_pages, price, copyright)
2 VALUES ("1", "2", "Oracle", "Oracle Server", "SQL", 664, 49.99, 2002);
SQL>
SQL> INSERT INTO book (isbn, parent_isbn, series, category, title, num_pages, price, copyright)
2 VALUES ("2", null, "Oracle", "Oracle Server", "Java", 772, 49.99, 2000);
SQL>
SQL> INSERT INTO book (isbn, parent_isbn, series, category, title, num_pages, price, copyright)
2 VALUES ("3", "1", "Oracle", "Oracle Server", "XML", 1008, 54.99, 2004);
SQL>
SQL> INSERT INTO book (isbn, parent_isbn, series, category, title, num_pages, price, copyright)
2 VALUES ("4", null, "Oracle Ebusiness", "Oracle Ebusiness", "Oracle E-Business Suite Financials Handbook", 820, 59.99, 2002);
SQL>
SQL>
SQL> ALTER TABLE book
2 ADD position NUMBER(10);
SQL>
SQL> PROMPT
SQL>
SQL> DECLARE
2 v_level PLS_INTEGER;
3 v_title book.TITLE%TYPE;
4
5 CURSOR cur_tree IS SELECT isbn, title, series FROM book;
6 BEGIN
7
8 FOR l IN cur_tree
9 LOOP
10
11 SELECT max(LEVEL) INTO v_level FROM book START WITH isbn = l.isbn CONNECT BY PRIOR parent_isbn = isbn;
12
13 UPDATE book SET position = v_level WHERE isbn = l.isbn;
14
15 END LOOP;
16
17 COMMIT;
18
19 EXCEPTION
20 WHEN OTHERS
21 THEN
22 DBMS_OUTPUT.PUT_LINE(sqlerrm);
23 END;
24 /
PL/SQL procedure successfully completed.
SQL>
SQL> SELECT title, position FROM book ORDER BY series, position;
TITLE
--------------------------------------------------------------------------------
POSITION
----------
Oracle8.0 PL/SQL Programming
1
Java
2
SQL
3
XML
4
Oracle E-Business Suite Financials Handbook
1
5 rows selected.
SQL> drop table book;
Table dropped.
Select for update
SQL>
SQL> create table my_data(
2 id number,
3 data varchar2(100) );
Table created.
SQL>
SQL> insert into my_data
2 select rownum, to_char( to_date( rownum, "J" ), "JSP" ) from all_objects
3 where rownum < 6;
5 rows created.
SQL>
SQL> select * from my_data;
ID DATA
---------- ----------------------------------------------------------------------------------------------------
1 ONE
2 TWO
3 THREE
4 FOUR
5 FIVE
SQL> insert into my_data values ( 6, "SIC" );
1 row created.
SQL>
SQL> declare
2 l_row my_data%rowtype;
3 begin
4 select * into l_row from my_data where id = 6 for update;
5 update my_data set data = "SIX" where id = 6;
6 commit;
7 exception
8 when NO_DATA_FOUND then
9 insert into my_data values ( 6, "SIX" );
10 end;
11 /
PL/SQL procedure successfully completed.
SQL>
SQL> select * from my_data;
ID DATA
---------- ----------------------------------------------------------------------------------------------------
1 ONE
2 TWO
3 THREE
4 FOUR
5 FIVE
6 SIX
6 rows selected.
SQL>
SQL> drop table my_data;
Table dropped.
SQL>
Two UPDATE statements.
SQL>
SQL> CREATE TABLE lecturer (
2 id NUMBER(5) PRIMARY KEY,
3 first_name VARCHAR2(20),
4 last_name VARCHAR2(20),
5 major VARCHAR2(30),
6 current_credits NUMBER(3)
7 );
Table created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10001, "Scott", "Lawson","Computer Science", 11);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major, current_credits)
2 VALUES (10002, "Mar", "Wells","History", 4);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10003, "Jone", "Bliss","Computer Science", 8);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10004, "Man", "Kyte","Economics", 8);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10005, "Pat", "Poll","History", 4);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10006, "Tim", "Viper","History", 4);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10007, "Barbara", "Blues","Economics", 7);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10008, "David", "Large","Music", 4);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10009, "Chris", "Elegant","Nutrition", 8);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10010, "Rose", "Bond","Music", 7);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10011, "Rita", "Johnson","Nutrition", 8);
1 row created.
SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
2 VALUES (10012, "Sharon", "Clear","Computer Science", 3);
1 row created.
SQL>
SQL> select * from lecturer;
ID FIRST_NAME LAST_NAME MAJOR CURRENT_CREDITS
-------- -------------------- -------------------- ------------------------------ ---------------
######## Scott Lawson Computer Science 11.00
######## Mar Wells History 4.00
######## Jone Bliss Computer Science 8.00
######## Man Kyte Economics 8.00
######## Pat Poll History 4.00
######## Tim Viper History 4.00
######## Barbara Blues Economics 7.00
######## David Large Music 4.00
######## Chris Elegant Nutrition 8.00
######## Rose Bond Music 7.00
######## Rita Johnson Nutrition 8.00
ID FIRST_NAME LAST_NAME MAJOR CURRENT_CREDITS
-------- -------------------- -------------------- ------------------------------ ---------------
######## Sharon Clear Computer Science 3.00
12 rows selected.
SQL>
SQL> CREATE TABLE MyTable (
2 num_col NUMBER,
3 char_col VARCHAR2(60)
4 );
Table created.
SQL>
SQL>
SQL> DECLARE
2 v_Major lecturer.major%TYPE;
3 v_CreditIncrease NUMBER := 3;
4 BEGIN
5 v_Major := "History";
6 UPDATE lecturer
7 SET current_credits = current_credits + v_CreditIncrease
8 WHERE major = v_Major;
9
10 UPDATE MyTable
11 SET num_col = 1, char_col = "abcd";
12 END;
13 /
PL/SQL procedure successfully completed.
SQL>
SQL> select * from lecturer;
ID FIRST_NAME LAST_NAME MAJOR CURRENT_CREDITS
-------- -------------------- -------------------- ------------------------------ ---------------
######## Scott Lawson Computer Science 11.00
######## Mar Wells History 7.00
######## Jone Bliss Computer Science 8.00
######## Man Kyte Economics 8.00
######## Pat Poll History 7.00
######## Tim Viper History 7.00
######## Barbara Blues Economics 7.00
######## David Large Music 4.00
######## Chris Elegant Nutrition 8.00
######## Rose Bond Music 7.00
######## Rita Johnson Nutrition 8.00
ID FIRST_NAME LAST_NAME MAJOR CURRENT_CREDITS
-------- -------------------- -------------------- ------------------------------ ---------------
######## Sharon Clear Computer Science 3.00
12 rows selected.
SQL>
SQL> select * from MyTable;
no rows selected
SQL>
SQL>
SQL> drop table lecturer;
Table dropped.
SQL>
SQL> drop table MyTable;
Table dropped.
SQL>
Update salary with stored procedure
SQL>
SQL> CREATE TABLE EMP(
2 EMPNO NUMBER(4) NOT NULL,
3 ENAME VARCHAR2(10),
4 JOB VARCHAR2(9),
5 MGR NUMBER(4),
6 HIREDATE DATE,
7 SAL NUMBER(7, 2),
8 COMM NUMBER(7, 2),
9 DEPTNO NUMBER(2)
10 );
Table created.
SQL> INSERT INTO EMP VALUES(2, "Jack", "Tester", 6,TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(3, "Wil", "Tester", 6,TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(4, "Jane", "Designer", 9,TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(5, "Mary", "Tester", 6,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(6, "Black", "Designer", 9,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7, "Chris", "Designer", 9,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(8, "Smart", "Helper", 4,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(9, "Peter", "Manager", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(10, "Take", "Tester", 6,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(13, "Fake", "Helper", 4,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL>
SQL> CREATE OR REPLACE PROCEDURE update_sal(id in number,p_sal in number)
2 authid current_user
3 AS
4 BEGIN
5 update EMP set sal = p_sal where empno = id;
6 END;
7 /
Procedure created.
SQL>
SQL> drop procedure update_sal;
Procedure dropped.
SQL> drop table emp;
Table dropped.
UPDATE statement can be used within PL/SQL programs to update a row or a set of rows
SQL>
SQL> -- create demo table
SQL> create table Employee(
2 ID VARCHAR2(4 BYTE) NOT NULL,
3 First_Name VARCHAR2(10 BYTE),
4 Last_Name VARCHAR2(10 BYTE),
5 Start_Date DATE,
6 End_Date DATE,
7 Salary Number(8,2),
8 City VARCHAR2(10 BYTE),
9 Description VARCHAR2(15 BYTE)
10 )
11 /
Table created.
SQL>
SQL> -- prepare data
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values ("01","Jason", "Martin", to_date("19960725","YYYYMMDD"), to_date("20060725","YYYYMMDD"), 1234.56, "Toronto", "Programmer")
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values("02","Alison", "Mathews", to_date("19760321","YYYYMMDD"), to_date("19860221","YYYYMMDD"), 6661.78, "Vancouver","Tester")
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values("03","James", "Smith", to_date("19781212","YYYYMMDD"), to_date("19900315","YYYYMMDD"), 6544.78, "Vancouver","Tester")
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values("04","Celia", "Rice", to_date("19821024","YYYYMMDD"), to_date("19990421","YYYYMMDD"), 2344.78, "Vancouver","Manager")
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values("05","Robert", "Black", to_date("19840115","YYYYMMDD"), to_date("19980808","YYYYMMDD"), 2334.78, "Vancouver","Tester")
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values("06","Linda", "Green", to_date("19870730","YYYYMMDD"), to_date("19960104","YYYYMMDD"), 4322.78,"New York", "Tester")
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values("07","David", "Larry", to_date("19901231","YYYYMMDD"), to_date("19980212","YYYYMMDD"), 7897.78,"New York", "Manager")
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values("08","James", "Cat", to_date("19960917","YYYYMMDD"), to_date("20020415","YYYYMMDD"), 1232.78,"Vancouver", "Tester")
3 /
1 row created.
SQL>
SQL>
SQL>
SQL> -- display data in the table
SQL> select * from Employee
2 /
Hit a key to continue
ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer
02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester
03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester
04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager
05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester
06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester
07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager
08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester
8 rows selected.
SQL>
SQL>
SQL>
SQL>
SQL> --UPDATE statement can be used within PL/SQL programs to update a row or a set of rows with a new --
SQL> --value.
SQL>
SQL> BEGIN
2 UPDATE employee
3 SET salary = salary * 2;
4 END;
5 /
PL/SQL procedure successfully completed.
SQL>
SQL>
SQL> select * from employee;
Hit a key to continue
ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01 Jason Martin 25-JUL-96 25-JUL-06 2469.12 Toronto Programmer
02 Alison Mathews 21-MAR-76 21-FEB-86 13323.56 Vancouver Tester
03 James Smith 12-DEC-78 15-MAR-90 13089.56 Vancouver Tester
04 Celia Rice 24-OCT-82 21-APR-99 4689.56 Vancouver Manager
05 Robert Black 15-JAN-84 08-AUG-98 4669.56 Vancouver Tester
06 Linda Green 30-JUL-87 04-JAN-96 8645.56 New York Tester
07 David Larry 31-DEC-90 12-FEB-98 15795.56 New York Manager
08 James Cat 17-SEP-96 15-APR-02 2465.56 Vancouver Tester
8 rows selected.
SQL>
SQL>
SQL>
SQL> -- clean the table
SQL> drop table Employee
2 /
Table dropped.
SQL>
SQL>
SQL>
Update table and return if success
SQL> CREATE TABLE EMP(
2 EMPNO NUMBER(4) NOT NULL,
3 ENAME VARCHAR2(10),
4 JOB VARCHAR2(9),
5 MGR NUMBER(4),
6 HIREDATE DATE,
7 SAL NUMBER(7, 2),
8 COMM NUMBER(7, 2),
9 DEPTNO NUMBER(2)
10 );
Table created.
SQL> INSERT INTO EMP VALUES(2, "Jack", "Tester", 6,TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(3, "Wil", "Tester", 6,TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(4, "Jane", "Designer", 9,TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(5, "Mary", "Tester", 6,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7, "Chris", "Designer", 9,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(8, "Smart", "Helper", 4,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(9, "Peter", "Manager", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(10, "Take", "Tester", 6,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(13, "Fake", "Helper", 4,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL>
SQL> select * from emp;
Enter...
2 Jack Tester 6 20-02-1981 1600 300 30
3 Wil Tester 6 22-02-1981 1250 500 30
4 Jane Designer 9 02-04-1981 2975 [N/A] 20
5 Mary Tester 6 28-09-1981 1250 1400 30
7 Chris Designer 9 09-06-1981 2450 [N/A] 10
8 Smart Helper 4 09-12-1982 3000 [N/A] 20
9 Peter Manager [N/A] 17-11-1981 5000 [N/A] 10
10 Take Tester 6 08-09-1981 1500 0 30
13 Fake Helper 4 03-12-1981 3000 [N/A] 20
9 rows selected.
SQL> create or replace procedure UPDATE_EMP(id number, val number,isSuccess out boolean) is
2 begin
3 if val = 0 then
4 isSuccess := false;
5 else
6 update EMP set SAL = SAL / val where empno = id;
7 isSuccess := true;
8 end if;
9 end;
10 /
Procedure created.
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL>
Update with variable
SQL>
SQL>
SQL> CREATE TABLE session (
2 department CHAR(3),
3 course NUMBER(3),
4 description VARCHAR2(2000),
5 max_lecturer NUMBER(3),
6 current_lecturer NUMBER(3),
7 num_credits NUMBER(1),
8 room_id NUMBER(5)
9 );
Table created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("HIS", 101, "History 101", 30, 11, 4, 20000);
1 row created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("HIS", 301, "History 301", 30, 0, 4, 20004);
1 row created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("CS", 101, "Computer Science 101", 50, 0, 4, 20001);
1 row created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("ECN", 203, "Economics 203", 15, 0, 3, 20002);
1 row created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("CS", 102, "Computer Science 102", 35, 3, 4, 20003);
1 row created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("MUS", 410, "Music 410", 5, 4, 3, 20005);
1 row created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("ECN", 101, "Economics 101", 50, 0, 4, 20007);
1 row created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("NUT", 307, "Nutrition 307", 20, 2, 4, 20008);
1 row created.
SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
2 VALUES ("MUS", 100, "Music 100", 100, 0, 3, NULL);
1 row created.
SQL>
SQL> select * from session;
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
HIS 101.00
History 101
30.00 11.00 4.00 ########
HIS 301.00
History 301
30.00 .00 4.00 ########
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
CS 101.00
Computer Science 101
50.00 .00 4.00 ########
ECN 203.00
Economics 203
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
15.00 .00 3.00 ########
CS 102.00
Computer Science 102
35.00 3.00 4.00 ########
MUS 410.00
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
Music 410
5.00 4.00 3.00 ########
ECN 101.00
Economics 101
50.00 .00 4.00 ########
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
NUT 307.00
Nutrition 307
20.00 2.00 4.00 ########
MUS 100.00
Music 100
100.00 .00 3.00
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
9 rows selected.
SQL>
SQL> DECLARE
2 v_NumCredits session.num_credits%TYPE;
3 BEGIN
4 v_NumCredits := 3;
5 UPDATE session
6 SET num_credits = v_NumCredits
7 WHERE department = "HIS"
8 AND course = 101;
9 END;
10 /
PL/SQL procedure successfully completed.
SQL>
SQL> select * from session;
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
HIS 101.00
History 101
30.00 11.00 3.00 ########
HIS 301.00
History 301
30.00 .00 4.00 ########
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
CS 101.00
Computer Science 101
50.00 .00 4.00 ########
ECN 203.00
Economics 203
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
15.00 .00 3.00 ########
CS 102.00
Computer Science 102
35.00 3.00 4.00 ########
MUS 410.00
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
Music 410
5.00 4.00 3.00 ########
ECN 101.00
Economics 101
50.00 .00 4.00 ########
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
NUT 307.00
Nutrition 307
20.00 2.00 4.00 ########
MUS 100.00
Music 100
100.00 .00 3.00
DEP COURSE
--- --------
DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------
MAX_LECTURER CURRENT_LECTURER NUM_CREDITS ROOM_ID
------------ ---------------- ----------- --------
9 rows selected.
SQL>
SQL> drop table session;
Table dropped.
Use procedure to update table
SQL>
SQL>
SQL>
SQL> CREATE TABLE Department (
2 DepartmentID INT NOT NULL PRIMARY KEY,
3 Name VARCHAR(50) NOT NULL,
4 Description VARCHAR(200) NULL);
Table created.
SQL>
SQL> CREATE SEQUENCE DepartmentIDSeq;
Sequence created.
SQL>
SQL> CREATE OR REPLACE TRIGGER DepartmentAutonumberTrigger
2 BEFORE INSERT ON Department
3 FOR EACH ROW
4 BEGIN
5 SELECT DepartmentIDSeq.NEXTVAL
6 INTO :NEW.DepartmentID FROM DUAL;
7 END;
8 /
Trigger created.
SQL>
SQL> INSERT INTO Department (Name, Description)
2 VALUES ("Software", "Coding");
1 row created.
SQL> INSERT INTO Department (Name, Description)
2 VALUES ("Hardware", "Building");
1 row created.
SQL> INSERT INTO Department (Name, Description)
2 VALUES ("QA", "Testing");
1 row created.
SQL>
SQL>
SQL>
SQL> CREATE or replace PROCEDURE UpdateDepartment
2 (DeptID IN integer,
3 DepartmentName IN varchar2,
4 DepartmentDescription IN varchar2)
5
6 AS
7 BEGIN
8 UPDATE Department
9 SET Name = DepartmentName,
10 Description = DepartmentDescription
11 WHERE DepartmentID = DeptID;
12 END;
13 /
Procedure created.
SQL>
SQL> show errors
No errors.
SQL>
SQL> EXECUTE UpdateDepartment (1, "Strange new name", "Strange new description");
PL/SQL procedure successfully completed.
SQL> SELECT * FROM Department;
DEPARTMENTID NAME
------------ --------------------------------------------------
DESCRIPTION
--------------------------------------------------------------------------------
1 Strange new name
Strange new description
2 Hardware
Building
3 QA
Testing
SQL>
SQL>
SQL> drop sequence DepartmentIDSeq;
Sequence dropped.
SQL> drop table Department;
Table dropped.
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