日期:2014-05-17 浏览次数:21072 次
with t1 as
(
select '2009' a,'胜' b from dual union all
select '2009' a,'败' b from dual union all
select '2009' a,'胜' b from dual union all
select '2008' a,'胜' b from dual union all
select '2008' a,'败' b from dual
)
select a 年份,sum(decode(b,'胜',1,0)) 胜,sum(decode(b,'败',1,0)) 败
from t1
group by a
年份 胜 败
----------------------------
1 2009 2 1
2 2008 1 1
------解决方案--------------------
CREATE TABLE T169
(
YEAR VARCHAR2(10),
RESULT VARCHAR2(2)
);
--
INSERT INTO T169 VALUES('2009', '胜');
INSERT INTO T169 VALUES('2009', '败');
INSERT INTO T169 VALUES('2009', '胜');
INSERT INTO T169 VALUES('2008', '败');
INSERT INTO T169 VALUES('2008', '胜');
方法一:
SELECT YEAR,
(SELECT COUNT(RESULT) FROM T169 c WHERE RESULT='胜' AND t.year =c.year)胜 ,
(SELECT COUNT( RESULT) FROM T169 c WHERE RESULT='败' AND t.year =c.year)败
FROM T169 t
GROUP BY YEAR;
方法二:
WITH cte
AS
(
SELECT YEAR,CASE RESULT WHEN '胜' THEN 1 WHEN '败'THEN 0 END res
FROM T169
)
SELECT YEAR,(SELECT COUNT(res) FROM cte c WHERE res>0 AND t.year =c.year),(SELECT COUNT( res) FROM cte c WHERE res=0 AND t.year =c.year)
FROM cte t
GROUP BY YEAR;