Oracle PL/SQL/Insert Delete Update/Update All

Update command without condition

 

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  /
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>  select * from employee;
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>  update employee set city = "BOSTON";
8 rows updated.
SQL>
SQL>  select * from employee;
ID   FIRST_NAME LAST_NAME  START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01   Jason      Martin     25-JUL-96 25-JUL-06    1234.56 BOSTON     Programmer
02   Alison     Mathews    21-MAR-76 21-FEB-86    6661.78 BOSTON     Tester
03   James      Smith      12-DEC-78 15-MAR-90    6544.78 BOSTON     Tester
04   Celia      Rice       24-OCT-82 21-APR-99    2344.78 BOSTON     Manager
05   Robert     Black      15-JAN-84 08-AUG-98    2334.78 BOSTON     Tester
06   Linda      Green      30-JUL-87 04-JAN-96    4322.78 BOSTON     Tester
07   David      Larry      31-DEC-90 12-FEB-98    7897.78 BOSTON     Manager
08   James      Cat        17-SEP-96 15-APR-02    1232.78 BOSTON     Tester
8 rows selected.
SQL>
SQL>  update employee set city = "ALBANY";
8 rows updated.
SQL>
SQL>
SQL> -- clean the table
SQL> drop table Employee
  2  /
Table dropped.
SQL>
SQL>
SQL>
SQL>

Update the emp table, converting emp names to uppercase

 
SQL> CREATE TABLE emp (
  2    id         NUMBER PRIMARY KEY,
  3    fname VARCHAR2(50),
  4    lname  VARCHAR2(50)
  5  );
Table created.
SQL>
SQL> INSERT INTO emp (id, fname, lname)VALUES (1, "A", "B");
1 row created.
SQL> INSERT INTO emp (id, fname, lname)VALUES (2, "C", "D");
1 row created.
SQL> INSERT INTO emp (id, fname, lname)VALUES (3, "Enn", "F");
1 row created.
SQL> INSERT INTO emp (id, fname, lname)VALUES (4, "G", "H");
1 row created.
SQL> INSERT INTO emp (id, fname, lname)VALUES (5, "G", "Z");
1 row created.
SQL>
SQL> SET SERVEROUTPUT ON
SQL>
SQL>
SQL> DECLARE
  2
  3     v_rowid ROWID;
  4     v_rowcount NUMBER := 0;
  5
  6     CURSOR emp_cur1 IS SELECT rowid FROM emp WHERE id > 50;
  7
  8     CURSOR emp_cur2 IS SELECT rowid FROM emp WHERE id > 50;
  9
 10  BEGIN
 11
 12     OPEN emp_cur1;
 13
 14     DELETE FROM emp WHERE id > 50;
 15
 16     OPEN emp_cur2;
 17
 18     
 19     FETCH emp_cur1 INTO v_rowid;
 20     IF emp_cur1%ROWCOUNT > 0
 21     THEN
 22        DBMS_OUTPUT.PUT_LINE("Cursor 1 includes the deleted rows");
 23     ELSE
 24        DBMS_OUTPUT.PUT_LINE("Cursor 1 does not include the deleted rows");
 25     END IF;
 26
 27     v_rowcount := 0;
 28     
 29     FETCH emp_cur2 INTO v_rowid;
 30     IF emp_cur2%ROWCOUNT > 0
 31     THEN
 32        DBMS_OUTPUT.PUT_LINE("Cursor 2 includes the deleted rows");
 33     ELSE
 34        DBMS_OUTPUT.PUT_LINE("Cursor 2 does not include the deleted rows");
 35     END IF;
 36
 37     CLOSE emp_cur1;
 38     CLOSE emp_cur2;
 39
 40     ROLLBACK;
 41
 42  EXCEPTION
 43     WHEN OTHERS
 44     THEN
 45        DBMS_OUTPUT.PUT_LINE(sqlerrm);
 46  END;
 47  /
Cursor 1 does not include the deleted rows
Cursor 2 does not include the deleted rows
PL/SQL procedure successfully completed.
SQL>
SQL> SET ESCAPE OFF
SQL>
SQL> drop table emp;
Table dropped.
SQL>