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我有以下两个关系:
Game(id, name, year)
Devs(pid, gid, role)
WITH GamesDevs (GameName, DevsCount)
AS
(
SELECT Game.name AS GameName, count(DISTINCT Devs.pid) AS DevsCount
FROM Game, Devs
WHERE Devs.gid=Game.id
GROUP BY Devs.gid, Game.name
)
SELECT * FROM GamesDevs WHERE GamesDevs.DevsCount = (SELECT MAX(DevsCount) FROM GamesDevs)
SELECT *
FROM (SELECT Game.name AS GameName, count(DISTINCT Devs.pid) AS DevsCount
FROM Game, Devs
WHERE Devs.gid=Game.id
GROUP BY Devs.gid, Game.name) GamesDevs
WHERE GamesDevs.DevsCount = (SELECT MAX(DevsCount) FROM GamesDevs)
Msg 207, Level 16, State 1, Line 6 Invalid column name 'DevsCount'.
最佳答案
您需要在最后一个 from 子句中复制该子查询,例如:
SELECT *
FROM (SELECT Game.name AS GameName, count(DISTINCT Devs.pid) AS DevsCount
FROM Game, Devs
WHERE Devs.gid=Game.id
GROUP BY Devs.gid, Game.name) GamesDevs
WHERE GamesDevs.DevsCount = (SELECT MAX(DevsCount) FROM (SELECT Game.name AS GameName, count(DISTINCT Devs.pid) AS DevsCount
FROM Game
INNER JOIN Devs ON Devs.gid=Game.id
GROUP BY Devs.gid, Game.name))
SELECT TOP 1 WITH TIES Game.name AS GameName, count(DISTINCT Devs.pid) AS DevsCount
FROM Game
INNER JOIN Devs ON Devs.gid=Game.id
GROUP BY Devs.gid, Game.name
ORDER BY DevsCount DESC
关于sql - 将 WITH 语句重写为 SQL 中的子查询语句?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29789521/
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