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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> select job, ename
2 , case
3 when sal <= 2500
4 then 'cheap'
5 else 'expensive'
6 end as class
7 from emp
8 where bdate < date '1964-01-01'
9 order by case job
10 when 'Designer' then 1
11 when 'Designer' then 2
12 else 3
13 end;
Enter...
Designer Black expensive
Designer Peter expensive
Tester Mary cheap
Manager Mike cheap
TRAINER Smart expensive
TRAINER Fake expensive
Tester Wil cheap
Tester Jack cheap
8 rows selected.
SQL>
SQL> drop table emp;
Table dropped.
SQL>
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