oracle表行列转换的问题
在oracle中,原表如图所示
客户编号时间数量
106/015000
106/03200
106/15400
206/042000
206/201000
306/01300
306/152000
306/30500
406/026000
406/29600
时间是六月份
如今要转换为下表
客户编号06/0106/0206/0306/0406/05......06/2906/30
15000020000 ........00
200020000..............00
33000000..............0500
406000000..............6000
用存储过程怎样实现,跪求各位大侠给写出详细代码。
[解决办法]
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;
[解决办法]
--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;/