col columnName new_value BLAH
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>
SQL> col empno new_value BLAH
SQL>
SQL> select empno, ename, bdate
2 , sal as salary
3 , comm as commission
4 from emp;
Enter...
month
EMPNO lname BDATE salary COMMISSION
------ -------------------- ---------- --------- ----------
1 Tom 17-12-1965 $800.00 [N/A]
2 Jack 20-02-1961 $1600.00 $300.00
3 Wil 22-02-1962 $1250.00 $500.00
4 Jane 02-04-1967 $2975.00 [N/A]
5 Mary 28-09-1956 $1250.00 $1400.00
6 Black 01-11-1963 $2850.00 [N/A]
7 Chris 09-06-1965 $2450.00 [N/A]
8 Smart 26-11-1959 $3000.00 [N/A]
9 Peter 17-11-1952 $5000.00 [N/A]
10 Take 28-09-1968 $1500.00 $.00
11 Ana 30-12-1966 $1100.00 [N/A]
12 Jane 03-12-1969 $800.00 [N/A]
13 Fake 13-02-1959 $3000.00 [N/A]
14 Mike 23-01-1962 $1300.00 [N/A]
14 rows selected.
SQL> def BLAH
DEFINE BLAH = 14 (NUMBER)
SQL>
SQL> select empno, ename, bdate
2 , sal as salary
3 , comm as commission
4 from emp
5 where deptno = 30;
Enter...
month
EMPNO lname BDATE salary COMMISSION
------ -------------------- ---------- --------- ----------
2 Jack 20-02-1961 $1600.00 $300.00
3 Wil 22-02-1962 $1250.00 $500.00
5 Mary 28-09-1956 $1250.00 $1400.00
6 Black 01-11-1963 $2850.00 [N/A]
10 Take 28-09-1968 $1500.00 $.00
12 Jane 03-12-1969 $800.00 [N/A]
6 rows selected.
SQL> def BLAH
DEFINE BLAH = 12 (NUMBER)
SQL> undef BLAH
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL>