摘要: #内连接select * from auth_user u inner join auth_group g on u.id = g.id; #左连接select * from auth_user a left join auth_group b on a.id = b.id; #右连接select 阅读全文
posted @ 2019-12-11 11:05 坏虫 阅读(447) 评论(0) 推荐(0) 编辑