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>
SQL> set null " [N/A]"
SQL>
SQL> select * from employees;
EMPNO last_name INIT JOB MGR BDATE MSAL DEPTNO
------ -------------------- ----- -------- ------ ---------- ------ ------
1 Jason N TRAINER 2 18-12-1965 800 10
2 Jerry J SALESREP 3 19-11-1966 1600 10
3 Jord T SALESREP 4 21-10-1967 1700 20
4 Mary J MANAGER 5 22-09-1968 1800 20
5 Joe P SALESREP 6 23-08-1969 1900 30
6 Black R MANAGER 7 24-07-1970 2000 30
7 Red A MANAGER 8 25-06-1971 2100 40
EMPNO last_name INIT JOB MGR BDATE MSAL DEPTNO
------ -------------------- ----- -------- ------ ---------- ------ ------
8 White S TRAINER 9 26-05-1972 2200 40
9 Yellow C DIRECTOR 10 27-04-1973 2300 20
10 Pink J SALESREP [N/A] 28-03-1974 2400 30
10 rows selected.
SQL>
SQL>
SQL> set null null
SQL>
SQL>
SQL> select * from employees;
EMPNO last_name INIT JOB MGR BDATE MSAL DEPTNO
------ -------------------- ----- -------- ------ ---------- ------ ------
1 Jason N TRAINER 2 18-12-1965 800 10
2 Jerry J SALESREP 3 19-11-1966 1600 10
3 Jord T SALESREP 4 21-10-1967 1700 20
4 Mary J MANAGER 5 22-09-1968 1800 20
5 Joe P SALESREP 6 23-08-1969 1900 30
6 Black R MANAGER 7 24-07-1970 2000 30
7 Red A MANAGER 8 25-06-1971 2100 40
EMPNO last_name INIT JOB MGR BDATE MSAL DEPTNO
------ -------------------- ----- -------- ------ ---------- ------ ------
8 White S TRAINER 9 26-05-1972 2200 40
9 Yellow C DIRECTOR 10 27-04-1973 2300 20
10 Pink J SALESREP null 28-03-1974 2400 30
10 rows selected.
SQL>
SQL>
SQL> drop table employees;
Table dropped.
SQL>