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mysql怎么取前三名 mysql怎么取第一条数据

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mysql版 查询各科成绩前三名的记录:(不考虑成绩并列情况)上面那条答案应该是可以的?。?可能是看起来复杂了点吧 ， 我自己试过是没问题的：
SELECT t1.sno,t1.cno,Score
FROM SC t1
WHERE EXISTS
(SELECT COUNT(1)
FROM SC
WHERE t1.cno= cno AND t1.scorescore
HAVING COUNT(1)3)
ORDER BY t1.cno,score DESC
另外还有一种类似的写法：
SELECT t1.sno,t1.cno,Score
FROM SC t1
WHERE
(SELECT COUNT(cno)
FROM SC
WHERE t1.cno= cno AND t1.scorescore)3
ORDER BY t1.cno,score DESC
Mysql 分组以后取每组的前三名数据Try this one,should be fine
下面这个已经有排序了哦 ， 不行么？
SELECT uid, group_concat(subject)
FROM (SELECT id, uid, subject
FROM (SELECT id, uid, subject,
(SELECT COUNT(*)
FROM t_subject
WHERE uid = t.uid
AND subject = t.subject) RK
FROM t_subject t) t1
WHERE rk = 3) t2
GROUP BY uid
多了个a.原来
或者你直接用个substring()得了 。。。
Mysql 单表查询各班级总分前三名select class,total,name from (select *,ywsc+sxsc as total from st ORDER BY total DESC) b
where
not EXISTS(select * from (select *,ywsc+sxsc as total from st ORDER BY total DESC) c where c.class=b.class and b.totalc.total GROUP BY c.class HAVING COUNT(*)2 )
ORDER BY b.class,b.total DESC
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