Question

我有以下SQL查询：

SELECT games.id, games.GameTitle FROM games 
WHERE EXISTS (
              SELECT filename FROM banners 
              WHERE banners.keyvalue = games.id 
                AND banners.filename LIKE '%front%'
             )

这对我的使用来说不太正确

我想要的是：

SELECT games.id, games.GameTitle 
FROM games WHERE EXISTS (
    COUNT(SELECT filename FROM banners 
    WHERE banners.keyvalue = games.id AND banners.filename LIKE '%front%') > 1
    )

即。仅在子查询检索多于一行时选择。

Answer 1

就是这样：

SELECT games.id, games.GameTitle 
FROM games 
WHERE (
    SELECT COUNT(filename)
    FROM banners
    WHERE banners.keyvalue = games.id AND banners.filename LIKE '%front%'
) > 1

Answer 2

SELECT games.id, games.GameTitle 
    FROM games 
    WHERE EXISTS (SELECT COUNT(filename) 
                      FROM banners 
                      WHERE banners.keyvalue = games.id 
                          AND banners.filename LIKE '%front%'
                      HAVING COUNT(filename)>1)

如何返回mysql子查询的行数

2 个答案: