sql - 对 JOIN 父级的限制

Question

我希望限制父级（文章）给出的行数，你知道怎么做吗？我不想限制总行数（LIMIT x），只限制“文章”表中的行数。

SELECT * FROM articles
INNER JOIN categories
ON articles.category_id = categories.id
INNER JOIN articleInfo
ON articles.id = articleInfo.article_id
INNER JOIN articleWeights
ON articles.id = articleWeights.article_id
INNER JOIN articlePictures
ON articles.id = articlePictures.article_id
WHERE articleInfo.lang = :lang

很无奈，怎么也找不到。。

谢谢！

Answer 1

既然你提到LIMIT了，我假设你正在使用MySQL. 您可以LIMIT使用subquery：

SELECT * 
FROM (SELECT * FROM articles LIMIT 10) articles
    INNER JOIN categories
        ON articles.category_id = categories.id
    INNER JOIN articleInfo
        ON articles.id = articleInfo.article_id
    INNER JOIN articleWeights
        ON articles.id = articleWeights.article_id
    INNER JOIN articlePictures
        ON articles.id = articlePictures.article_id
WHERE articleInfo.lang = :lang