rollup(a,b,c)=group by a,b,c + group by a,b + group by a + group by null
rollup(a,b)=group a,b + group by a + group by null

SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ------------------------------ --------------- ---------- --------------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 800 20
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7566 JONES MANAGER 7839 02-APR-81 2975 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7788 SCOTT ANALYST 7566 19-APR-87 3000 20
7839 KING PRESIDENT 17-NOV-81 5000 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7934 MILLER CLERK 7782 23-JAN-82 1300 10

14 rows selected.

SQL> select * from dept;
DEPTNO DNAME LOC
---------- ------------------------ ---------------------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON

SQL> list
1 select b.dname,a.job,sum(sal) from emp a,dept b
2 where a.deptno=b.deptno
3* group by rollup(b.dname,a.job)
SQL> /

DNAME JOB SUM(SAL)
------------------------------------------ --------------------------- ----------
SALES CLERK 950
SALES MANAGER 2850
SALES SALESMAN 5600
SALES 9400
RESEARCH CLERK 1900
RESEARCH ANALYST 6000
RESEARCH MANAGER 2975
RESEARCH 10875
ACCOUNTING CLERK 1300
ACCOUNTING MANAGER 2450
ACCOUNTING PRESIDENT 5000
ACCOUNTING 8750
29025
可以改變rollup中的順序，得到不同報表。
SQL> edit

Wrote file afiedt.buf
1 select a.job,b.dname,sum(sal) from emp a,dept b
2 where a.deptno=b.deptno
3* group by rollup(a.job,b.dname)
SQL> /

JOB DNAME SUM(SAL)
--------------------------- ------------------------ ----------
CLERK SALES 950
CLERK RESEARCH 1900
CLERK ACCOUNTING 1300
CLERK 4150
ANALYST RESEARCH 6000
ANALYST 6000
MANAGER SALES 2850
MANAGER RESEARCH 2975
MANAGER ACCOUNTING 2450
MANAGER 8275
SALESMAN SALES 5600
SALESMAN 5600
PRESIDENT ACCOUNTING 5000
PRESIDENT 5000
29025
15 rows selected.

可以進行例外rollup
SQL> edit
Wrote file afiedt.buf

1 select b.dname,a.job,sum(sal) from emp a,dept b
2 where a.deptno=b.deptno
3* group by b.dname,rollup(a.job)
SQL> /

DNAME JOB SUM(SAL)
------------------------ --------------------------- ----------
SALES CLERK 950
SALES MANAGER 2850
SALES SALESMAN 5600
SALES 9400
RESEARCH CLERK 1900
RESEARCH ANALYST 6000
RESEARCH MANAGER 2975
RESEARCH 10875
ACCOUNTING CLERK 1300
ACCOUNTING MANAGER 2450
ACCOUNTING PRESIDENT 5000
ACCOUNTING 8750

12 rows selected.

SQL> edit
Wrote file afiedt.buf

1 select to_char(a.hiredate,'yyyy') hiredate,b.dname,a.job,sum(a.sal)
2 from emp a,dept b
3 where a.deptno=b.deptno
4* group by rollup(to_char(a.hiredate,'yyyy'),b.dname,a.job)
SQL> /

HIREDATE DNAME JOB SUM(A.SAL)
--------------- ------------------------ --------------------------- ----------
1980 RESEARCH CLERK 800
1980 RESEARCH 800
1980 800
1981 SALES CLERK 950
1981 SALES MANAGER 2850
1981 SALES SALESMAN 5600
1981 SALES 9400
1981 RESEARCH ANALYST 3000
1981 RESEARCH MANAGER 2975
1981 RESEARCH 5975
1981 ACCOUNTING MANAGER 2450
1981 ACCOUNTING PRESIDENT 5000
1981 ACCOUNTING 7450
1981 22825
1982 ACCOUNTING CLERK 1300
1982 ACCOUNTING 1300
1982 1300
1987 RESEARCH CLERK 1100
1987 RESEARCH ANALYST 3000
1987 RESEARCH 4100
1987 4100
29025
22 rows selected.

[Developer] Rollup

相關文章