mysql:
问题:Column 'id' in field list is ambiguous原因:两个表中都有id,它不知道查哪一个表里面的ID。解决方案:主键的查询须用别名点的方式获取。定义不同的别名,主键必须用别名标明是哪个表的主键。select aaa.id diaryId,
userId, bookId, type, content, video, videoPic, viewCount, likeCount, commentCount, recommend, sss.state, reward, sss.nickName, sss.phone, createTime from discovery_diary aaa left join user sss on sss.id=aaa.userId where aaa.userId='567' limit 2