日期:2014-05-17 浏览次数:21150 次
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) total
FROM tanjotest
GROUP 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) total
FROM tanjotest
GROUP BY STUDENT;
------解决方案--------------------
--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;
/