Cluase partition does not work
Version Oracle 10g
Hi gurus
I wonder what my is not partitioning against deptno, please see below for more details.
Query
Select * from scott.dept d partition by (d.deptno)
join left scott.emp e on d.deptno = e.deptno
-where d.deptno = 10
;
The query result
DEPTNO, DNAME, LOC, EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO_1
10 ACCOUNTS NEW YORK 7782 CLARK MANAGER 7839 2450 JUNE 9 81 10
10 ACCOUNTS NEW YORK 7839 KING PRESIDENT NOVEMBER 17, 81 5000 10
10 ACCOUNTS NEW YORK 7934 MILLER 7782 1300 23 JANUARY CLERK 82 10
20 RESEARCH DALLAS 7566 JONES MANAGER 7839 2975 2 APRIL 81 20
20 RESEARCH DALLAS FORD 7902 7566 3000 3 DECEMBER ANALYST 81 20
SEARCH DALLAS 20, 7876 ADAMS 7788 1100 23 MAY CLERK 87 20
SEARCH DALLAS 20 7369 SMITH 7902 17 DECEMBER CLERK 80 800 20
SEARCH DALLAS 20 7788 SCOTT ANALYST 7566 3000 APRIL 19, 87 20
30 SALES CHICAGO 7521 WARD 7698 1250 22 FEBRUARY SALESMAN 81 500 30
30 SALES CHICAGO 7844 TURNER 7698 08 - SEP - 81 1500 0 30 SALESMAN
30 SALES CHICAGO 7499 ALLEN 7698 1600 20 FEBRUARY SALESMAN 81 300 30
30 SALES CHICAGO 7900 7698 DECEMBER 3, CLERK JAMES 81 950 30
30 CHICAGO 7698 BLAKE SALES MANAGER 7839 2850 MAY 1, 81 30
30 SALES CHICAGO 7654 MARTIN 7698 28 - SEP - 81 1250 1400 30 SALESMAN
40 OPERATIONS BOSTON
It looks like my understanding about the partition by clause wrong, please correct me.
Concerning
MIT
Hi, Mit,.
Mitchels wrote:
Version Oracle 10g
Hi gurus
I wonder what my is not partitioning against deptno, please see below for more details.
Query
Select * from scott.dept d partition by (d.deptno)
join left scott.emp e on d.deptno = e.deptno
-where d.deptno = 10
;
The query result
DEPTNO, DNAME, LOC, EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO_1
10 ACCOUNTS NEW YORK 7782 CLARK MANAGER 7839 2450 JUNE 9 81 10
10 ACCOUNTS NEW YORK 7839 KING PRESIDENT NOVEMBER 17, 81 5000 10
10 ACCOUNTS NEW YORK 7934 MILLER 7782 1300 23 JANUARY CLERK 82 10
20 RESEARCH DALLAS 7566 JONES MANAGER 7839 2975 2 APRIL 81 20
20 RESEARCH DALLAS FORD 7902 7566 3000 3 DECEMBER ANALYST 81 20
SEARCH DALLAS 20, 7876 ADAMS 7788 1100 23 MAY CLERK 87 20
SEARCH DALLAS 20 7369 SMITH 7902 17 DECEMBER CLERK 80 800 20
SEARCH DALLAS 20 7788 SCOTT ANALYST 7566 3000 APRIL 19, 87 20
30 SALES CHICAGO 7521 WARD 7698 1250 22 FEBRUARY SALESMAN 81 500 30
30 SALES CHICAGO 7844 TURNER 7698 08 - SEP - 81 1500 0 30 SALESMAN
30 SALES CHICAGO 7499 ALLEN 7698 1600 20 FEBRUARY SALESMAN 81 300 30
30 SALES CHICAGO 7900 7698 DECEMBER 3, CLERK JAMES 81 950 30
30 CHICAGO 7698 BLAKE SALES MANAGER 7839 2850 MAY 1, 81 30
30 SALES CHICAGO 7654 MARTIN 7698 28 - SEP - 81 1250 1400 30 SALESMAN
40 OPERATIONS BOSTON
It looks like my understanding about the partition by clause wrong, please correct me.
Concerning
MIT
Sorry, I don't know what is your understanding, so I don't know if it's good or bad.
You might find the below request a better illustration of how works a partitioned outer join:
SELECT d.deptno, d.dname - a few columns, to reduce clutter
e.ename, e.job, e.empno
OF scott.dept d
LEFT JOIN scott.emp e PARTITION BY (e.job)
ON e.deptno = d.deptno
ORDER BY d.deptno
e.job, e.ename
;
Output:
DEPTNO DNAME EMPNO EMPLOYMENT ENAME
---------- -------------- ---------- --------- ----------
10 ANALYST ACCOUNTANT
10 ACCOUNTING CLERK 7934 MILLER
10 ACCOUNTING CLARK MANAGER 7782
10 ACCOUNTING PRESIDENT KING 7839
10 ACCOUNTING VENDOR
SEARCH 20 FORD ANALYST 7902
20 RESEARCH ANALYST SCOTT 7788
20 RESEARCH ADAMS CLERK 7876
SEARCH 20 SMITH CLERK 7369
20 JONES RESEARCH MANAGER 7566
PRESIDENT RESEARCH 20
20 RESEARCH SELLER
30 SALES ANALYST
30 SALES CLERK JAMES 7900
30 SALES MANAGER BLAKE 7698
30 SALE CHAIRMAN
30 SALES SALESMAN ALLEN 7499
30 SALES SALESMAN MARTIN 7654
30 SALE TURNER SELLER 7844
30 SALES SALESMAN WARD 7521
THE 40 OPERATIONS ANALYST
40 OPERATIONS CLERK
40 OPERATIONS MANAGER
40 OPERATIONS PRESIDENT
40 SELLER OPERATIONS
Tags: Database
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