MySQL - 这个版本的MySQL还不支持'LIMIT&IN/ALL/ANY/SOME子查询

Question

这是我正在使用的代码

    $Last_Video         = $db->fetch_all('
    SELECT VID, thumb
    FROM video
    WHERE VID IN (
        SELECT VID
        FROM video
        WHERE title LIKE "%'.$Channel['name'].'%"
        ORDER BY viewtime DESC
        LIMIT 5)
    ORDER BY RAND()
    LIMIT 1
');

这是给我的错误

 Message:   Error during SQL execution: SELECT VID, thumb FROM video WHERE VID IN ( SELECT VID FROM video WHERE title LIKE "%funny%" ORDER BY viewtime DESC LIMIT 5) ORDER BY RAND() LIMIT 1<br />
 MySQL Error:   This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'<br />
MySQL Errno:    1235

我怎么能解决这个问题？它的其他方式...所以我没有得到错误...

Answer 1

您可以使用JOIN而不是IN

SELECT v.VID, v.thumb
FROM video AS v
INNER JOIN
     (SELECT VID
     FROM video
     WHERE title LIKE "%'.$Channel['name'].'%"
     ORDER BY viewtime DESC
     LIMIT 5) as v2
  ON v.VID = v2.VID
ORDER BY RAND()
LIMIT 1

Answer 2

您可以使用以下方法绕过此错误.

$Last_Video = $db->fetch_all('
    SELECT VID, thumb
    FROM video
    WHERE VID IN (select * from (
        SELECT VID
        FROM video
        WHERE title LIKE "%'.$Channel['name'].'%"
        ORDER BY viewtime DESC
        LIMIT 5) temp_tab)
    ORDER BY RAND()
    LIMIT 1
');

Answer 3

这里不需要子查询.试试这个:

 SELECT VID, thumb
 FROM video
 WHERE title LIKE "%'.$Channel['name'].'%"
 ORDER BY RAND() DESC
 LIMIT 1

在MySQL 5.0.26及更高版本中,您将收到错误:

对于某些子查询运算符,MySQL不支持子查询中的LIMIT:

参考.