delect from score where 学号=2009 and 课程名=政治delect from score where 学号=2009 and 课程名=政治 意思是什么?

delect from score where 学号=2009 and 课程名=政治delect from score where 学号=2009 and 课程名=政治 意思是什么? score score score score “score indirect quesitons from wh-question怎么翻译? sql语句：去掉最大值,去掉最小值,算平均值SELECT AVG(Scores.Score)FROM ScoresWHERE ( ( (Scores.[ID]) = @id)AND (Score < (SELECT MAX(Score) From Scores WHERE Scores.[ID] = @id) )AND (Score > (SELECT MIN(Score) From Scores WHERE Scores.[I why you delect your message什么意思 这段文字的意思update student　　set grade = (　　select grade from　　(　　select id,　　case when score> 90 then 'a'　　when score > 80 then 'b'　　when score > 70 then 'c'　　else 'd' end grade　　from student　　) a 关于SQL语句里面的A.XX,和B.select B.kecheng,B.score,B.xuehaofrom(select kecheng ,max(score) AS score from jiaScore group by kecheng) A,jiaScore Bwhere A.kecheng = B.kechengand A.score = B.score例如我这段数据库语句,A.kecheng和B.keche score a score是什么意思 score造句 score是什么意思? score意思 score many score 复数