Do calculation in where clause : Where « Query Select « Oracle PL/SQL Tutorial






  1. Oracle PL/SQL Tutorial
  2. Query Select
  3. Where
SQL>
SQL>
SQL> CREATE TABLE titles(
  2    title_id   CHAR(3)      NOT NULL,
  3    title_name VARCHAR(40)  NOT NULL,
  4    type       VARCHAR(10)  NULL    ,
  5    pub_id     CHAR(3)      NOT NULL,
  6    pages      INTEGER      NULL    ,
  7    price      DECIMAL(5,2) NULL    ,
  8    sales      INTEGER      NULL    ,
  9    pubdate    DATE         NULL    ,
 10    contract   SMALLINT     NOT NULL
 11  );

Table created.

SQL>
SQL>
SQL>
SQL>
SQL> INSERT INTO titles VALUES('T01','Java','history','P01',111,21.99,566,DATE '2000-08-01',1);

1 row created.

SQL> INSERT INTO titles VALUES('T02','Oracle','history','P03', 114,19.95,9566,DATE '1998-04-01',1);

1 row created.

SQL> INSERT INTO titles VALUES('T03','SQL','computer','P02', 122,39.95,25667,DATE '2000-09-01',1);

1 row created.

SQL> INSERT INTO titles VALUES('T04','C++','psychology','P04', 511,12.99,13001,DATE '1999-05-31',1);

1 row created.

SQL> INSERT INTO titles VALUES('T05','Python','psychology','P04', 101,6.95,201440,DATE '2001-01-01',1);

1 row created.

SQL> INSERT INTO titles VALUES('T06','JavaScript','biography','P01', 173,19.95,11320,DATE '2000-07-31',1);

1 row created.

SQL> INSERT INTO titles VALUES('T07','LINQ','biography','P03', 331,23.95,1500200,DATE '1999-10-01',1);

1 row created.

SQL> INSERT INTO titles VALUES('T08','C#','children','P04', 861,10.00,4095,DATE '2001-06-01',1);

1 row created.

SQL> INSERT INTO titles VALUES('T09','SQL Server','children','P04', 212,13.95,5000,DATE '2002-05-31',1);

1 row created.

SQL> INSERT INTO titles VALUES('T10','AJAX','biography','P01', NULL,NULL,NULL,NULL,0);

1 row created.

SQL> INSERT INTO titles VALUES('T11','VB','psychology','P04', 821,7.99,94123,DATE '2000-11-30',1);

1 row created.

SQL> INSERT INTO titles VALUES('T12','Office','biography','P01', 507,12.99,100001,DATE '2000-08-31',1);

1 row created.

SQL> INSERT INTO titles VALUES('T13','VBA','history','P03', 812,29.99,10467,DATE '1999-05-31',1);

1 row created.

SQL>
SQL>
SQL>
SQL>
SQL> SELECT title_name,
  2         price * sales AS "Revenue"
  3    FROM titles
  4    WHERE price * sales > 1000000;

TITLE_NAME                                  Revenue
---------------------------------------- ----------
SQL                                      1025396.65
Python                                      1400008
LINQ                                       35929790
Office                                   1299012.99

SQL>
SQL> drop table titles;

Table dropped.

SQL>








2.3.Where
2.3.1.Filtering Rows Using the WHERE Clause
2.3.2.A WHERE Clause Is Added to the Statement
2.3.3.Using the WHERE and GROUP BY Clauses Together
2.3.4.Convert char to number implicit in where clause
2.3.5.Compare Number type in where clause
2.3.6.where with complated boolean expressions
2.3.7.Where with sub query
2.3.8.where comm = comm, compare with itself
2.3.9.Where with count from subquery
2.3.10.Do calculation in where clause