Compare with number : Select clause « Query Select « Oracle PL/SQL Tutorial






  1. Oracle PL/SQL Tutorial
  2. Query Select
  3. Select clause
SQL>
SQL>
SQL> create table employees(
  2    empno      NUMBER(4)
  3  , ename      VARCHAR2(8)
  4  , init       VARCHAR2(5)
  5  , job        VARCHAR2(8)
  6  , mgr        NUMBER(4)
  7  , bdate      DATE
  8  , msal       NUMBER(6,2)
  9  , comm       NUMBER(6,2)
 10  , deptno     NUMBER(2) ) ;

Table created.

SQL>
SQL>
SQL> insert into employees values(1,'Jason',  'N',  'TRAINER', 2,   date '1965-12-18',  800 , NULL,  10);

1 row created.

SQL> insert into employees values(2,'Jerry',  'J',  'SALESREP',3,   date '1966-11-19',  1600, 300,   10);

1 row created.

SQL> insert into employees values(3,'Jord',   'T' , 'SALESREP',4,   date '1967-10-21',  1700, 500,   20);

1 row created.

SQL> insert into employees values(4,'Mary',   'J',  'MANAGER', 5,   date '1968-09-22',  1800, NULL,  20);

1 row created.

SQL> insert into employees values(5,'Joe',    'P',  'SALESREP',6,   date '1969-08-23',  1900, 1400,  30);

1 row created.

SQL> insert into employees values(6,'Black',  'R',  'MANAGER', 7,   date '1970-07-24',  2000, NULL,  30);

1 row created.

SQL> insert into employees values(7,'Red',    'A',  'MANAGER', 8,   date '1971-06-25',  2100, NULL,  40);

1 row created.

SQL> insert into employees values(8,'White',  'S',  'TRAINER', 9,   date '1972-05-26',  2200, NULL,  40);

1 row created.

SQL> insert into employees values(9,'Yellow', 'C',  'DIRECTOR',10,  date '1973-04-27',  2300, NULL,  20);

1 row created.

SQL> insert into employees values(10,'Pink',  'J',  'SALESREP',null,date '1974-03-28',  2400, 0,     30);

1 row created.

SQL>
SQL>
SQL> select empno, ename, comm
  2  from   employees
  3  where  comm > 400;

     EMPNO ENAME          COMM
---------- -------- ----------
         3 Jord            500
         5 Joe            1400

SQL>
SQL> select empno, ename, comm
  2  from   employees
  3  where  comm <= 400;

     EMPNO ENAME          COMM
---------- -------- ----------
         2 Jerry           300
        10 Pink              0

SQL>
SQL>
SQL> drop table employees;

Table dropped.

SQL>
SQL>








2.2.Select clause
2.2.1.Performing Single Table SELECT Statements
2.2.2.Select employee first and last and sort by last name
2.2.3.List single column from a table
2.2.4.Use as to specify the alias name
2.2.5.Use function in select clause
2.2.6.Use more than one aggregate functions in a select statement
2.2.7.where clause
2.2.8.Compare with number
2.2.9.Concatenate string
2.2.10.Select from a Subquery
2.2.11.Select constant as a column
2.2.12.Negate a column value
2.2.13.Math calculation in select statement
2.2.14.Search for String Across Columns
2.2.15.Don't Perform the Same Calculation Over and Over
2.2.16.NO_INDEX function in select statement