本文介绍了如何从其他表中不存在的表中选择值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 我有三张桌子: STDS 主题 STDS_SUBJECTS std_subjects包含std_id和subject_id以及他的分数我希望用户查看所有主题除了他已经通过的那些主题 stds(std_id,std_user_name,std_name)科目(subject_id,subject_name_subject_score) 多谢谢解决方案 I Have Three Tables:STDSSUBJECTSSTDS_SUBJECTS The std_subjects contain std_id and subject_id and his score i want the user to view all the subjects Except those which he have pass themstds (std_id , std_user_name,std_name)subjects (subject_id,subject_name_subject_score)many thank 解决方案 这篇关于如何从其他表中不存在的表中选择值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!
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