SQL計數where子句

我有以下SQL語句：SQL計數where子句

SELECT  [l.LeagueId] AS LeagueId, [l.LeagueName] AS NAME, [lp.PositionId] 
FROM   (Leagues l INNER JOIN 
        Lineups lp ON l.LeagueId = lp.LeagueId) 
WHERE  (lp.PositionId = 1) OR 
        (lp.PositionId = 3) OR 
        (lp.PositionId = 2)

我真正需要的是讓行，其中位置的數量比數。類似於：

SELECT  [l.LeagueId] AS LeagueId, [l.LeagueName] AS NAME, [lp.PositionId] 
FROM   (Leagues l INNER JOIN 
        Lineups lp ON l.LeagueId = lp.LeagueId) 
WHERE  Count(lp.PositionId = 1) > 2 OR 
        Count(lp.PositionId = 3) > 6 OR 
        Count(lp.PositionId = 2) > 3

有什麼辦法可以在SQL中做到這一點？

來源

2010-08-09 Kris B

所以，我用下面凱德魯的解決方案，但沒有人知道爲什麼，當我將HAVING從OR語句更改爲AND語句，我得到零結果？如果我只使用一個SUM（CASE ..）語句，我會得到結果，但是如果將兩個有效的語句組合在一起，我會得到零結果。 – 2010-08-09 15:14:48

這個怎麼樣？：

SELECT  [l.LeagueId] AS LeagueId, [l.LeagueName] AS NAME 
FROM   (Leagues l INNER JOIN 
        Lineups lp ON l.LeagueId = lp.LeagueId) 
GROUP BY [l.LeagueId], [l.LeagueName] 
HAVING  SUM(CASE WHEN lp.PositionId = 1 THEN 1 ELSE 0 END) > 2 OR 
        SUM(CASE WHEN lp.PositionId = 3 THEN 1 ELSE 0 END) > 6 OR 
        SUM(CASE WHEN lp.PositionId = 2 THEN 1 ELSE 0 END) > 3

來源

2010-08-09 14:17:50

HAVING就是你要找的關鍵字：

SELECT  [l.LeagueId] AS LeagueId, [l.LeagueName] AS NAME, [lp.PositionId] 
FROM   (Leagues l INNER JOIN 
        Lineups lp ON l.LeagueId = lp.LeagueId) 
GROUP BY lp.PositionId, l.LeagueName 
HAVING lp.PositionId = 1 AND COUNT(*) > 2 
     OR lp.PositionId = 2 AND COUNT(*) > 3 
     OR lp.PositionId = 3 AND COUNT(*) > 6

來源

2010-08-09 14:16:36

SQL計數where子句

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