在oracle中,原表如图所示
客户编号 时间 数量
1 06/01 5000
1 06/03 200
1 06/15 400
2 06/04 2000
2 06/20 1000
3 06/01 300
3 06/15 2000
3 06/30 500
4 06/02 6000
4 06/29 600
时间是六月份
如今要转换为下表
客户编号 06/01 06/02 06/03 06/04 06/05 ...... 06/29 06/30
1 5000 0 200 0 0 ........ 0 0
2 0 0 0 2000 0.............. 0 0
3 300 0 0 0 0.............. 0 500
4 0 6000 0 0 0.............. 600 0
用存储过程怎样实现,跪求各位大侠给写出详细代码。
------解决方案--------------------
- SQL code
數據create table TANJOTEST( STUDENT VARCHAR2(20), COURSE VARCHAR2(20), SCORE NUMBER);INSERT INTO tanjotest(STUDENT, COURSE,SCORE)VALUES('張三', '語文',80);INSERT INTO tanjotest(STUDENT, COURSE,SCORE)VALUES('張三', '數學',90);INSERT INTO tanjotest(STUDENT, COURSE,SCORE)VALUES('張三', '英語',50);INSERT INTO tanjotest(STUDENT, COURSE,SCORE)VALUES('李四', '語文',40);INSERT INTO tanjotest(STUDENT, COURSE,SCORE)VALUES('李四', '數學',50);INSERT INTO tanjotest(STUDENT, COURSE,SCORE)VALUES('李四', '英語',60);INSERT INTO tanjotest(STUDENT, COURSE,SCORE)VALUES('王五', '數學',100);方法參考:方法一:SELECT STUDENT,MAX(decode(COURSE,'語文',SCORE,0)) 語文,MAX(decode(COURSE,'數學',SCORE,0)) 數學,MAX(decode(COURSE,'英語',SCORE,0)) 英語,SUM(SCORE) totalFROM tanjotestGROUP BY STUDENT;方法二:SELECT STUDENT,MAX(decode(COURSE,'語文',SCORE,0)) 語文,MAX(decode(COURSE,'數學',SCORE,0)) 數學,MAX(decode(COURSE,'英語',SCORE,0)) 英語,SUM(SCORE) totalFROM tanjotestGROUP BY STUDENT;
------解决方案--------------------
- SQL code
--我感觉你这只是你总需求的一部分,因为你少了年份,或者说比如表里存的不只是6月份的数据,等等情况,你还没说清楚,--就针对你说的只有6月份数据,这里写的存储过程有个输入参数月份,方便你后续扩展create or replace procedure row_to_col_func(v_rq in varchar2,cur out sys_refcursor)as sqlstr varchar2(3000):='select a.custno ';begin for rs in ( with t as( select to_date(v_rq,'mm') mon from dual ) select to_char(mon+level-1,'mm/dd') new_rq from t connect by level<=to_char(last_day(mon),'dd') ) loop sqlstr:=sqlstr||chr(10)||','||'max(decode(a.rq,'''||rs.new_rq||''',a.quantity,0)) as "'||rs.new_rq||'"'; end loop ; sqlstr:=sqlstr||chr(10)||'from tab a group by a.custno ' ; open cur for sqlstr;end row_to_col_func;/