1052：字段列表中的列“ memberID”不明确

Question

I have 2 tables: blog_posts & blog_members. I want to select the postStatus entity from blog_posts through using innerjoin. But i always get this error: Column 'memberID' in field list is ambiguous

memberID is a FK in blog_posts.

This is my query.

 $stmt = $db->query('SELECT memberID, username, email, status, date_joined, blog_posts.postStatus FROM blog_members INNER JOIN blog_posts ON blog_members.memberID = blog_posts.memberID WHERE status != "admin1" ORDER BY date_joined DESC');

Answer 1

您需要指定来自哪个表的memberID ，即使由于memberID条件而在两个表中相等：

SELECT blog_members.memberID,  ...

Answer 2

问题是您在多个表中都具有列memberID，因此需要明确说明要从哪个表中获取值，例如：

SELECT blog_posts.memberID...