如何返回MySQL的子查詢的行數

Question

我有以下SQL查詢：

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

這是不是我的使用十分正確

什麼，我想是這樣的：

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 
    ) 

即只有當子查詢檢索多於一行時才選擇。

Answer 1

只要這樣的：

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)