使用多个表从数据库中获取正确的ID

Question

我有这个SQL查询来获取特定类别中的所有博客帖子：

SELECT * FROM blogposts AS bp, blogpost_categories AS bpc
WHERE bpc.id_category = '3'
AND bpc.id_blogpost = bp.id
ORDER BY bp.date_published DESC

问题在于，当我获得博客文章的ID号时，我会收到类别ID号，这是错误的。

如何解决此问题？

提前致谢。

Answer 1

指定您想要的ID（f.e。bp.id或bpc.id。）并考虑使用join来澄清查询：

SELECT  bp.id as BlogPostId
,       bpc.id as CategoryId
FROM    blogposts AS bp
JOIN    blogpost_categories AS bpc
ON      bpc.id_blogpost = bp.id
WHERE   bpc.id_category = '3'