ORACLE排列序号问题

Posted 2023-05-09

现有数据表如下：
日期 | 人员
2015-01-01 | A
2015-01-10 | A
2015-01-15 | A
2015-02-01 | B
2015-02-10 | B
2015-02-15 | B
2015-02-20 | B
2015-02-01 | A
2015-02-10 | A
2015-02-15 | A

现需要根据人员和日期，添加一列排序列

效果如下：
日期 | 人员 | 序号
2015-01-01 | A | 1
2015-01-10 | A | 2
2015-01-15 | A | 3
2015-02-01 | B | 1
2015-02-10 | B | 2
2015-02-15 | B | 3
2015-02-20 | B | 4
2015-02-01 | A | 1
2015-02-10 | A | 2
2015-02-15 | A | 3

请高手不吝赐教，能否用SQL来实现。谢谢！

参考技术A 这个很简单的：
如下：

CREATE TABLE TEMP_AVG_SCORE
(T_DATA DATE,
T_NAME VARCHAR2(10)
) ;

INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-01-01','YYYY-MM-DD'),'A') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-01-10','YYYY-MM-DD'),'A') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-01-15','YYYY-MM-DD'),'A') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-02-01','YYYY-MM-DD'),'B') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-02-10','YYYY-MM-DD'),'B') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-02-15','YYYY-MM-DD'),'B') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-02-20','YYYY-MM-DD'),'B') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-02-01','YYYY-MM-DD'),'A') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-02-10','YYYY-MM-DD'),'A') ;
INSERT INTO TEMP_AVG_SCORE VALUES (TO_DATE('2015-02-15','YYYY-MM-DD'),'A') ;

COMMIT;

SELECT T.T_DATA,
T.T_NAME,
ROW_NUMBER() OVER(PARTITION BY TO_CHAR(T.T_DATA, 'MM'), T.T_NAME ORDER BY T.T_DATA) RN
FROM TEMP_AVG_SCORE T ;本回答被提问者采纳

Oracle 序号函数

Oracle提供的序号函数:
以emp表为例:
1: rownum 最简单的序号 但是在order by之前就确定值.
select rownum,t.* from emp t order by ename

行数	ROWNUM	EMPNO	ENAME	JOB	MGR	HIREDATE	SAL	COMM	DEPTNO
1	11	7876	ADAMS	CLERK	7788	1987-5-23	1100		20
2	2	7499	ALLEN	SALESMAN	7698	1981-2-20	1600	300	30
3	6	7698	BLAKE	MANAGER	7839	1981-5-1	2850		30
4	7	7782	CLARK	MANAGER	7839	1981-6-9	2450		10
5	13	7902	FORD	ANALYST	7566	1981-12-3	3000		20
6	12	7900	JAMES	CLERK	7698	1981-12-3	950		30
7	4	7566	JONES	MANAGER	7839	1981-4-2	2975		20
8	9	7839	KING	PRESIDENT		1981-11-17	5000		10
9	5	7654	MARTIN	SALESMAN	7698	1981-9-28	1250	1400	30
10	14	7934	MILLER	CLERK	7782	1982-1-23	1300		10
11	8	7788	SCOTT	ANALYST	7566	1987-4-19	3000		20
12	1	7369	SMITH	CLERK	7902	1980-12-17	800		20
13	10	7844	TURNER	SALESMAN	7698	1981-9-8	1500	0	30
14	3	7521	WARD	SALESMAN	7698	1981-2-22	1250	500	30

2: row_number() over( order by 字段名1,字段名2,...字段名n ) 先排序再确定序号.
select row_number() over( order by ename ) as rm, t.* from emp t

行数	RM	EMPNO	ENAME	JOB	MGR	HIREDATE	SAL	COMM	DEPTNO
1	1	7876	ADAMS	CLERK	7788	1987-5-23	1100		20
2	2	7499	ALLEN	SALESMAN	7698	1981-2-20	1600	300	30
3	3	7698	BLAKE	MANAGER	7839	1981-5-1	2850		30
4	4	7782	CLARK	MANAGER	7839	1981-6-9	2450		10
5	5	7902	FORD	ANALYST	7566	1981-12-3	3000		20
6	6	7900	JAMES	CLERK	7698	1981-12-3	950		30
7	7	7566	JONES	MANAGER	7839	1981-4-2	2975		20
8	8	7839	KING	PRESIDENT		1981-11-17	5000		10
9	9	7654	MARTIN	SALESMAN	7698	1981-9-28	1250	1400	30
10	10	7934	MILLER	CLERK	7782	1982-1-23	1300		10
11	11	7788	SCOTT	ANALYST	7566	1987-4-19	3000		20
12	12	7369	SMITH	CLERK	7902	1980-12-17	800		20
13	13	7844	TURNER	SALESMAN	7698	1981-9-8	1500	0	30
14	14	7521	WARD	SALESMAN	7698	1981-2-22	1250	500	30

3: 和上面的不同之处在于PARTITION分区.在每一个小分区内部取序号.
select row_number() over(PARTITION BY deptno order by sal ) as rm, t.* from emp t

行数	RM	EMPNO	ENAME	JOB	MGR	HIREDATE	SAL	COMM	DEPTNO
1	1	7934	MILLER	CLERK	7782	1982-1-23	1300		10
2	2	7782	CLARK	MANAGER	7839	1981-6-9	2450		10
3	3	7839	KING	PRESIDENT		1981-11-17	5000		10
4	1	7369	SMITH	CLERK	7902	1980-12-17	800		20
5	2	7876	ADAMS	CLERK	7788	1987-5-23	1100		20
6	3	7566	JONES	MANAGER	7839	1981-4-2	2975		20
7	4	7788	SCOTT	ANALYST	7566	1987-4-19	3000		20
8	5	7902	FORD	ANALYST	7566	1981-12-3	3000		20
9	1	7900	JAMES	CLERK	7698	1981-12-3	950		30
10	2	7521	WARD	SALESMAN	7698	1981-2-22	1250	500	30
11	3	7654	MARTIN	SALESMAN	7698	1981-9-28	1250	1400	30
12	4	7844	TURNER	SALESMAN	7698	1981-9-8	1500	0	30
13	5	7499	ALLEN	SALESMAN	7698	1981-2-20	1600	300	30
14	6	7698	BLAKE	MANAGER	7839	1981-5-1	2850		30

4: rank()在这里表示针对每个部门员工的工资取序号.
select rank() over(PARTITION BY deptno order by sal ) as rnk, t.* from emp t;

行数	RNK	EMPNO	ENAME	JOB	MGR	HIREDATE	SAL	COMM	DEPTNO
1	1	7934	MILLER	CLERK	7782	1982-1-23	1300		10
2	2	7782	CLARK	MANAGER	7839	1981-6-9	2450		10
3	3	7839	KING	PRESIDENT		1981-11-17	5000		10
4	1	7369	SMITH	CLERK	7902	1980-12-17	800		20
5	2	7876	ADAMS	CLERK	7788	1987-5-23	1100		20
6	3	7566	JONES	MANAGER	7839	1981-4-2	2975		20
7	4	7788	SCOTT	ANALYST	7566	1987-4-19	3000		20
8	4	7902	FORD	ANALYST	7566	1981-12-3	3000		20
9	1	7900	JAMES	CLERK	7698	1981-12-3	950		30
10	2	7521	WARD	SALESMAN	7698	1981-2-22	1250	500	30
11	2	7654	MARTIN	SALESMAN	7698	1981-9-28	1250	1400	30
12	4	7844	TURNER	SALESMAN	7698	1981-9-8	1500	0	30
13	5	7499	ALLEN	SALESMAN	7698	1981-2-20	1600	300	30
14	6	7698	BLAKE	MANAGER	7839	1981-5-1	2850		30

5: 从例子中可以看到dense_rank()和rank()的唯一区别就是:
dense_rank()中并列第二名后是第三名.
rank()中并列第二名后是第四名.
select dense_rank() over(PARTITION BY deptno order by sal ) as dense_rnk, t.* from emp t;

行数	DENSE_RNK	EMPNO	ENAME	JOB	MGR	HIREDATE	SAL	COMM	DEPTNO
1	1	7934	MILLER	CLERK	7782	1982-1-23	1300		10
2	2	7782	CLARK	MANAGER	7839	1981-6-9	2450		10
3	3	7839	KING	PRESIDENT		1981-11-17	5000		10
4	1	7369	SMITH	CLERK	7902	1980-12-17	800		20
5	2	7876	ADAMS	CLERK	7788	1987-5-23	1100		20
6	3	7566	JONES	MANAGER	7839	1981-4-2	2975		20
7	4	7788	SCOTT	ANALYST	7566	1987-4-19	3000		20
8	4	7902	FORD	ANALYST	7566	1981-12-3	3000		20
9	1	7900	JAMES	CLERK	7698	1981-12-3	950		30
10	2	7521	WARD	SALESMAN	7698	1981-2-22	1250	500	30
11	2	7654	MARTIN	SALESMAN	7698	1981-9-28	1250	1400	30
12	3	7844	TURNER	SALESMAN	7698	1981-9-8	1500	0	30
13	4	7499	ALLEN	SALESMAN	7698	1981-2-20	1600	300	30
14	5	7698	BLAKE	MANAGER	7839	1981-5-1	2850		30