Oracle PL/SQL/Select Query/Logical Operators
Содержание
Compare Date type value
<source lang="sql">
SQL> SQL> CREATE TABLE purchase (
2 product_name VARCHAR2(25), 3 quantity NUMBER(4,2), 4 purchase_date DATE, 5 salesperson VARCHAR2(3) 6 );
Table created. SQL> SQL> INSERT INTO purchase VALUES ("A", 1, "14-JUL-03", "CA"); 1 row created. SQL> INSERT INTO purchase VALUES ("B", 75, "14-JUL-03", "BB"); 1 row created. SQL> INSERT INTO purchase VALUES ("C", 2, "14-JUL-03", "GA"); 1 row created. SQL> INSERT INTO purchase VALUES ("D", 8, "15-JUL-03", "GA"); 1 row created. SQL> INSERT INTO purchase VALUES ("A", 20, "15-JUL-03", "LB"); 1 row created. SQL> INSERT INTO purchase VALUES ("B", 2, "16-JUL-03", "CA"); 1 row created. SQL> INSERT INTO purchase VALUES ("C", 25, "16-JUL-03", "LB"); 1 row created. SQL> INSERT INTO purchase VALUES ("D", 2, "17-JUL-03", "BB"); 1 row created. SQL> SQL> SELECT * FROM purchase; PRODUCT_NAME QUANTITY PURCHASE_ SAL
---------- --------- ---
A 1 14-JUL-03 CA B 75 14-JUL-03 BB C 2 14-JUL-03 GA D 8 15-JUL-03 GA A 20 15-JUL-03 LB B 2 16-JUL-03 CA C 25 16-JUL-03 LB D 2 17-JUL-03 BB 8 rows selected. SQL> SQL> DELETE FROM purchase
2 WHERE purchase_date > "15-JUL-03";
3 rows deleted. SQL> SQL> SELECT * FROM purchase; PRODUCT_NAME QUANTITY PURCHASE_ SAL
---------- --------- ---
A 1 14-JUL-03 CA B 75 14-JUL-03 BB C 2 14-JUL-03 GA D 8 15-JUL-03 GA A 20 15-JUL-03 LB 5 rows selected. SQL> SQL> DROP TABLE purchase; Table dropped. SQL>
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compare varchar type value in where clause
<source lang="sql">
SQL> SQL> CREATE TABLE purchase (
2 product_name VARCHAR2(25), 3 quantity NUMBER(4,2), 4 purchase_date DATE, 5 salesperson VARCHAR2(3) 6 );
Table created. SQL> SQL> INSERT INTO purchase VALUES ("A", 1, "14-JUL-03", "CA"); 1 row created. SQL> INSERT INTO purchase VALUES ("B", 75, "14-JUL-03", "BB"); 1 row created. SQL> INSERT INTO purchase VALUES ("C", 2, "14-JUL-03", "GA"); 1 row created. SQL> INSERT INTO purchase VALUES ("D", 8, "15-JUL-03", "GA"); 1 row created. SQL> INSERT INTO purchase VALUES ("A", 20, "15-JUL-03", "LB"); 1 row created. SQL> INSERT INTO purchase VALUES ("B", 2, "16-JUL-03", "CA"); 1 row created. SQL> INSERT INTO purchase VALUES ("C", 25, "16-JUL-03", "LB"); 1 row created. SQL> INSERT INTO purchase VALUES ("D", 2, "17-JUL-03", "BB"); 1 row created. SQL> SQL> SELECT * FROM purchase; PRODUCT_NAME QUANTITY PURCHASE_ SAL
---------- --------- ---
A 1 14-JUL-03 CA B 75 14-JUL-03 BB C 2 14-JUL-03 GA D 8 15-JUL-03 GA A 20 15-JUL-03 LB B 2 16-JUL-03 CA C 25 16-JUL-03 LB D 2 17-JUL-03 BB 8 rows selected. SQL> SQL> SQL> DELETE FROM purchase
2 WHERE product_name = "A";
2 rows deleted. SQL> SQL> SELECT * FROM purchase; PRODUCT_NAME QUANTITY PURCHASE_ SAL
---------- --------- ---
B 75 14-JUL-03 BB C 2 14-JUL-03 GA D 8 15-JUL-03 GA B 2 16-JUL-03 CA C 25 16-JUL-03 LB D 2 17-JUL-03 BB 6 rows selected. SQL> SQL> SQL> DROP TABLE purchase; Table dropped. SQL>
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Demo for Order of Precedence for Logical Operators
<source lang="sql">
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"), 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("03","James", "Smith", to_date("19781212","YYYYMMDD"), to_date("19900315","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("04","Celia", "Rice", to_date("19821024","YYYYMMDD"), to_date("19990421","YYYYMMDD"), 2334.78, "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"), 2334.78,"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"), 2334.78,"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"), 2334.78,"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 2334.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 2334.78 Vancouver Tester 04 Celia Rice 24-OCT-82 21-APR-99 2334.78 Vancouver Manager 05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester 06 Linda Green 30-JUL-87 04-JAN-96 2334.78 New York Tester 07 David Larry 31-DEC-90 12-FEB-98 2334.78 New York Manager 08 James Cat 17-SEP-96 15-APR-02 2334.78 Vancouver Tester 8 rows selected. SQL> SQL> SQL> SQL> SQL> SQL> SQL> -- Demo for Order of Precedence for Logical Operators SQL> SQL> SELECT ID, First_Name, Last_Name, Salary, Start_Date
2 FROM Employee 3 WHERE First_Name ="Smith" 4 AND CITY ="New York" or City ="Vancouver";
ID FIRST_NAME LAST_NAME SALARY START_DAT
---------- ---------- ---------- ---------
02 Alison Mathews 2334.78 21-MAR-76 03 James Smith 2334.78 12-DEC-78 04 Celia Rice 2334.78 24-OCT-82 05 Robert Black 2334.78 15-JAN-84 08 James Cat 2334.78 17-SEP-96 SQL> SQL> SQL> SELECT ID, First_Name, Last_Name, Salary, Start_Date
2 FROM Employee 3 WHERE First_Name ="Smith" 4 AND (CITY ="New York" or City ="Vancouver");
no rows selected SQL> SQL> SQL> SQL> SQL> SQL> SQL> SQL> -- clean the table SQL> drop table Employee
2 /
Table dropped. SQL> SQL> SQL>
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Not(condition1 and condition2)
<source lang="sql">
SQL> SQL> SQL> create table emp
2 ( empno NUMBER(4) constraint E_PK primary key 3 , ename VARCHAR2(8) 4 , init VARCHAR2(5) 5 , job VARCHAR2(8) 6 , mgr NUMBER(4) 7 , bdate DATE 8 , sal NUMBER(6,2) 9 , comm NUMBER(6,2) 10 , deptno NUMBER(2) default 10 11 ) ;
Table created. SQL> insert into emp values(1,"Tom","N", "TRAINER", 13,date "1965-12-17", 800 , NULL, 20); 1 row created. SQL> insert into emp values(2,"Jack","JAM", "Tester",6,date "1961-02-20", 1600, 300, 30); 1 row created. SQL> insert into emp values(3,"Wil","TF" , "Tester",6,date "1962-02-22", 1250, 500, 30); 1 row created. SQL> insert into emp values(4,"Jane","JM", "Designer", 9,date "1967-04-02", 2975, NULL, 20); 1 row created. SQL> insert into emp values(5,"Mary","P", "Tester",6,date "1956-09-28", 1250, 1400, 30); 1 row created. SQL> insert into emp values(6,"Black","R", "Designer", 9,date "1963-11-01", 2850, NULL, 30); 1 row created. SQL> insert into emp values(7,"Chris","AB", "Designer", 9,date "1965-06-09", 2450, NULL, 10); 1 row created. SQL> insert into emp values(8,"Smart","SCJ", "TRAINER", 4,date "1959-11-26", 3000, NULL, 20); 1 row created. SQL> insert into emp values(9,"Peter","CC", "Designer",NULL,date "1952-11-17", 5000, NULL, 10); 1 row created. SQL> insert into emp values(10,"Take","JJ", "Tester",6,date "1968-09-28", 1500, 0, 30); 1 row created. SQL> insert into emp values(11,"Ana","AA", "TRAINER", 8,date "1966-12-30", 1100, NULL, 20); 1 row created. SQL> insert into emp values(12,"Jane","R", "Manager", 6,date "1969-12-03", 800 , NULL, 30); 1 row created. SQL> insert into emp values(13,"Fake","MG", "TRAINER", 4,date "1959-02-13", 3000, NULL, 20); 1 row created. SQL> insert into emp values(14,"Mike","TJA","Manager", 7,date "1962-01-23", 1300, NULL, 10); 1 row created. SQL> SQL> select ename, init
2 from emp 3 where not (ename = "Jane" and init = "R");
Enter... Tom N Jack JAM Wil TF Jane JM Mary P Black R Chris AB Smart SCJ Peter CC Take JJ Ana AA Fake MG Mike TJA 13 rows selected. SQL> drop table emp; Table dropped. SQL>
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