Case with grouping and rollup : ROLLUP « Analytical Functions « Oracle PL/SQL Tutorial

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',  NULL, 0,     30);

1 row created.

SQL>
SQL> select   deptno
  2  ,        case grouping(job)
  3                when 0 then job
  4                when 1 then '**total**'
  5           end  job
  6  ,        count(empno) headcount
  7  from     employees
  8  group by ROLLUP(deptno, job);

    DEPTNO JOB        HEADCOUNT
---------- --------- ----------
        10 TRAINER            1
        10 SALESREP           1
        10 **total**          2
        20 MANAGER            1
        20 DIRECTOR           1
        20 SALESREP           1
        20 **total**          3
        30 MANAGER            1
        30 SALESREP           2
        30 **total**          3
        40 MANAGER            1
        40 TRAINER            1
        40 **total**          2
           **total**         10

14 rows selected.

SQL>
SQL>
SQL> drop table employees;

Table dropped.

SQL>

16.24.ROLLUP
	16.24.1.	Using the ROLLUP Clause
	16.24.2.	Passing Multiple Columns to ROLLUP
	16.24.3.	Changing the Position of Columns Passed to ROLLUP
	16.24.4.	Uses AVG() with ROLLUP
	16.24.5.	Using a Column Multiple Times in a GROUP BY Clause
	16.24.6.	The ROLLUP function was provided to conveniently give the sum on the aggregate.
	16.24.7.	A two-dimensional grouping with ROLLUP
	16.24.8.	A SUM using ROLLUP.
	16.24.9.	Rollup with two columns
	16.24.10.	Case with grouping and rollup
	16.24.11.	Count employees, group by ROLLUP(department no, job title)
	16.24.12.	group by ROLLUP(department no, job title)