摘要:
查询语句:select * from courseware c left join user_cour uc on c.cid = uc.cid left join `user` u on uc.uid = u.uid where u.uid=1; 表格:user user_cour cour表格 阅读全文
posted @ 2016-09-12 10:12
新月勾魂
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摘要:
user表格 user—cour表格关联表 cour表格 查询语句:select * from courseware c left join user_cour uc on c.cid = uc.cid left join `user` u on uc.uid = u.uid where u.uid 阅读全文
posted @ 2016-09-12 10:10
新月勾魂
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