Group by case
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> -- 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> insert into emp(emp_no, lastname, firstname, midinit, street, city, state, zip,shortZipCode, area_code, phone, salary, birthdate, startDate,title, dept_no, mgr, region, division, total_sales)valu
es
2 (2,'X','Lucy','J','1 Street','New York','NY','43552','6633','212','234-4444',7.75,'21-mar-1976','1-feb-1994','Sales Manager',2,1,100,10,40000);
1 row created.
SQL> insert into emp(emp_no, lastname, firstname, midinit, street, city, state, zip,shortZipCode, area_code, phone, salary, birthdate, startDate,title, dept_no, mgr, region, division, total_sales)valu
es
2 (3,'Y','Jordan','E','1 Drive','New York','NY','76822','8763','212','222-2222',7.75,'14-feb-1963','15-mar-1995','Sales Clerk',2,2,100,10,10000);
1 row created.
SQL>
SQL> select
2 case when salary between 6 and 10 then 'Salary 06-10'
3 when salary between 11 and 15 then 'Salary 11-15'
4 when salary between 16 and 20 then 'Salary 16-20'
5 when salary between 21 and 25 then 'Salary 21-25'
6 else 'Salary OOR'
7 end
8 AS bucket,
9 count(*) num_emps
10 from emp
11 group by
12 case when salary between 6 and 10 then 'Salary 06-10'
13 when salary between 11 and 15 then 'Salary 11-15'
14 when salary between 16 and 20 then 'Salary 16-20'
15 when salary between 21 and 25 then 'Salary 21-25'
16 else 'Salary OOR'
17 end
18 /
BUCKET NUM_EMPS
------------ ----------
Salary 06-10 2
Salary OOR 1
2 rows selected.
SQL>
SQL> drop table emp;
Table dropped.
SQL>
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