日期:2014-05-17 浏览次数:20937 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
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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;