Oracle PL/SQL/Analytical Functions/Range — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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Версия 13:45, 26 мая 2010
count(*) over partition, order by, range unbounded preceding for employee table
SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
2 ENAME VARCHAR2(10),
3 JOB VARCHAR2(9),
4 MGR NUMBER(4),
5 HIREDATE DATE,
6 SAL NUMBER(7, 2),
7 COMM NUMBER(7, 2),
8 DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, "SMITH", "CLERK", 7902, TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, "ALLEN", "SALESMAN", 7698, TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, "WARD", "SALESMAN", 7698, TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, "JONES", "MANAGER", 7839, TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), 1300, NULL, 10);
1 row created.
SQL>
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7369.00 SMITH CLERK 7902.00 17-DEC-80 800.00 20
7499.00 ALLEN SALESMAN 7698.00 20-FEB-81 1600.00 300.00 30
7521.00 WARD SALESMAN 7698.00 22-FEB-81 1250.00 500.00
7566.00 JONES MANAGER 7839.00 02-APR-81 2975.00 20
7654.00 MARTIN SALESMAN 7698.00 28-SEP-81 1250.00 1400.00 30
7698.00 BLAKE MANAGER 7839.00 01-MAY-81 2850.00
7782.00 CLARK MANAGER 7839.00 09-JUN-81 2450.00 10
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7788.00 SCOTT ANALYST 7566.00 09-DEC-82 3000.00 20
7839.00 KING PRESIDENT 17-NOV-81 5000.00 10
7844.00 TURNER SALESMAN 7698.00 08-SEP-81 1500.00 .00 30
7876.00 ADAMS CLERK 7788.00 12-JAN-83 1100.00 20
7900.00 JAMES CLERK 7698.00 03-DEC-81 950.00 30
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7902.00 FORD ANALYST 7566.00 03-DEC-81 3000.00 20
7934.00 MILLER CLERK 7782.00 23-JAN-82 1300.00 10
14 rows selected.
SQL>
SQL> select * from ( select deptno, ename, sal,
2 count(*) over ( partition by deptno
3 order by sal desc, ename
4 range unbounded preceding ) cnt
5 from emp )
6 where cnt <= 3
7 order by deptno, sal desc
8 /
DEPTNO ENAME SAL CNT
------ ---------- -------- --------
10 KING 5000.00 1.00
CLARK 2450.00 2.00
MILLER 1300.00 3.00
20 FORD 3000.00 1.00
SCOTT 3000.00 2.00
JONES 2975.00 3.00
30 BLAKE 2850.00 1.00
ALLEN 1600.00 2.00
TURNER 1500.00 3.00
9 rows selected.
SQL>
SQL> drop table emp;
Table dropped.
SQL>
SQL>
first_value order by range between preceding and following
SQL>
SQL> set echo on
SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
2 ENAME VARCHAR2(10),
3 JOB VARCHAR2(9),
4 MGR NUMBER(4),
5 HIREDATE DATE,
6 SAL NUMBER(7, 2),
7 COMM NUMBER(7, 2),
8 DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, "SMITH", "CLERK", 7902, TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, "ALLEN", "SALESMAN", 7698, TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, "WARD", "SALESMAN", 7698, TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, "JONES", "MANAGER", 7839, TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), 1300, NULL, 10);
1 row created.
SQL>
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7369.00 SMITH CLERK 7902.00 17-DEC-80 800.00 20
7499.00 ALLEN SALESMAN 7698.00 20-FEB-81 1600.00 300.00 30
7521.00 WARD SALESMAN 7698.00 22-FEB-81 1250.00 500.00
7566.00 JONES MANAGER 7839.00 02-APR-81 2975.00 20
7654.00 MARTIN SALESMAN 7698.00 28-SEP-81 1250.00 1400.00 30
7698.00 BLAKE MANAGER 7839.00 01-MAY-81 2850.00
7782.00 CLARK MANAGER 7839.00 09-JUN-81 2450.00 10
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7788.00 SCOTT ANALYST 7566.00 09-DEC-82 3000.00 20
7839.00 KING PRESIDENT 17-NOV-81 5000.00 10
7844.00 TURNER SALESMAN 7698.00 08-SEP-81 1500.00 .00 30
7876.00 ADAMS CLERK 7788.00 12-JAN-83 1100.00 20
7900.00 JAMES CLERK 7698.00 03-DEC-81 950.00 30
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7902.00 FORD ANALYST 7566.00 03-DEC-81 3000.00 20
7934.00 MILLER CLERK 7782.00 23-JAN-82 1300.00 10
14 rows selected.
SQL>
SQL> select ename, hiredate,
2 first_value(ename) over
3 (order by hiredate asc
4 range between 100 preceding and 100 following),
5 last_value(ename) over
6 (order by hiredate asc
7 range between 100 preceding and 100 following)
8 from emp
9 order by hiredate asc
10 /
ENAME HIREDATE FIRST_VALU LAST_VALUE
---------- --------- ---------- ----------
SMITH 17-DEC-80 SMITH WARD
ALLEN 20-FEB-81 SMITH BLAKE
WARD 22-FEB-81 SMITH BLAKE
JONES 02-APR-81 ALLEN CLARK
BLAKE 01-MAY-81 ALLEN CLARK
CLARK 09-JUN-81 JONES TURNER
TURNER 08-SEP-81 CLARK JAMES
MARTIN 28-SEP-81 TURNER JAMES
KING 17-NOV-81 TURNER MILLER
FORD 03-DEC-81 TURNER MILLER
JAMES 03-DEC-81 TURNER MILLER
ENAME HIREDATE FIRST_VALU LAST_VALUE
---------- --------- ---------- ----------
MILLER 23-JAN-82 KING MILLER
SCOTT 09-DEC-82 SCOTT ADAMS
ADAMS 12-JAN-83 SCOTT ADAMS
14 rows selected.
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL>
SQL>
range unbounded preceding
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
2 ENAME VARCHAR2(10),
3 JOB VARCHAR2(9),
4 MGR NUMBER(4),
5 HIREDATE DATE,
6 SAL NUMBER(7, 2),
7 COMM NUMBER(7, 2),
8 DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, "SMITH", "CLERK", 7902, TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, "ALLEN", "SALESMAN", 7698, TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, "WARD", "SALESMAN", 7698, TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, "JONES", "MANAGER", 7839, TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), 1300, NULL, 10);
1 row created.
SQL>
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7369.00 SMITH CLERK 7902.00 17-DEC-80 800.00 20
7499.00 ALLEN SALESMAN 7698.00 20-FEB-81 1600.00 300.00 30
7521.00 WARD SALESMAN 7698.00 22-FEB-81 1250.00 500.00
7566.00 JONES MANAGER 7839.00 02-APR-81 2975.00 20
7654.00 MARTIN SALESMAN 7698.00 28-SEP-81 1250.00 1400.00 30
7698.00 BLAKE MANAGER 7839.00 01-MAY-81 2850.00
7782.00 CLARK MANAGER 7839.00 09-JUN-81 2450.00 10
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7788.00 SCOTT ANALYST 7566.00 09-DEC-82 3000.00 20
7839.00 KING PRESIDENT 17-NOV-81 5000.00 10
7844.00 TURNER SALESMAN 7698.00 08-SEP-81 1500.00 .00 30
7876.00 ADAMS CLERK 7788.00 12-JAN-83 1100.00 20
7900.00 JAMES CLERK 7698.00 03-DEC-81 950.00 30
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7902.00 FORD ANALYST 7566.00 03-DEC-81 3000.00 20
7934.00 MILLER CLERK 7782.00 23-JAN-82 1300.00 10
14 rows selected.
SQL>
SQL> select *
2 from (select deptno, ename, sal,
3 count(*) over (partition by deptno
4 order by sal desc
5 range unbounded preceding)
6 cnt from emp)
7 where cnt <= 3
8 order by deptno, sal desc
9 /
DEPTNO ENAME SAL CNT
------ ---------- -------- --------
10 KING 5000.00 1.00
CLARK 2450.00 2.00
MILLER 1300.00 3.00
20 SCOTT 3000.00 2.00
FORD 3000.00 2.00
JONES 2975.00 3.00
30 BLAKE 2850.00 1.00
ALLEN 1600.00 2.00
TURNER 1500.00 3.00
9 rows selected.
SQL>
SQL> drop table emp;
Table dropped.
SQL>