MySQL 子查询限制

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时间:2020-08-31 16:04:37  来源:igfitidea点击:

MySQL Subquery LIMIT

mysqlsubquery

提问by Atif Mohammed Ameenuddin

As the title says, I wanted a workaround for this...

正如标题所说,我想要一个解决方法......

SELECT 
  comments.comment_id,
  comments.content_id,
  comments.user_id,
  comments.`comment`,
  comments.comment_time,
  NULL
FROM
  comments
WHERE
  (comments.content_id IN (SELECT content.content_id FROM content WHERE content.user_id = 1 LIMIT 0, 10))

Cheers

干杯

回答by Quassnoi

SELECT  comments.comment_id,
        comments.content_id,
        comments.user_id,
        comments.`comment`,
        comments.comment_time,
        NULL
FROM    (
        SELECT  content.content_id
        FROM    content
        WHERE   content.user_id = 1
        LIMIT 10
        ) q
JOIN    comments
ON      comments.content_id = q.content_id

You probably will want to add an ORDER BYinto the nested query.

您可能希望ORDER BY在嵌套查询中添加。