SQL>
SQL> create table emp(
2 emp_no integer primary key
3 ,lastname varchar2(20) not null
4 ,firstname varchar2(15) not null
5 ,midinit varchar2(1)
6 ,street varchar2(30)
7 ,city varchar2(20)
8 ,state varchar2(2)
9 ,zip varchar2(5)
10 ,shortZipCode varchar2(4)
11 ,area_code varchar2(3)
12 ,phone varchar2(8)
13 ,salary number(5,2)
14 ,birthdate date
15 ,startDate date
16 ,title varchar2(20)
17 ,dept_no integer
18 ,mgr integer
19 ,region number
20 ,division number
21 ,total_sales number
22 );
Table created.
SQL>
SQL>
SQL>
SQL>
SQL> -- emp Table Inserts:
SQL> insert into emp(emp_no, lastname, firstname, midinit, street, city, state, zip,shortZipCode, area_code, phone, birthdate, title)values
2 (1,'Z','Joy','R','1 Ave','New York','NY','12122','2333','212','200-1111','12-nov-1976','President');
1 row created.
SQL>
SQL>
SQL>
SQL>
SQL> create table avg_sal
2 as select avg(salary) AS avg_Sal from emp;
Table created.
SQL>
SQL>
SQL> select
2 case when salary between 6 and 8 then '6-8'
3 when salary in (9,10) then '9-10'
4 when exists (select null from avg_sal where avg_sal = salary)
5 then 'EXISTS'
6 when to_char(salary) like '2%' then 'Like2'
7 when salary is null then 'Null'
8 else 'ELSE Empno: '|| emp_no
9 end
10 AS case_test
11 from emp
12 /
CASE_TEST
----------------------------------------------------
Null
SQL>
SQL>
SQL> drop table avg_sal;
Table dropped.
SQL>
SQL> drop table emp;
Table dropped.
SQL>
SQL>
SQL>