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2、create table xs(xh int(11) not null Primary,其他字段最后一个不加逗号);3、select * from xs where zy="计算机" order by xh desc4、你只提到了学生表；我可以告诉你sql怎么写 select * from 表1 a,表2 b,表3 c where a.Ccredit=5 and b.Grade>60 5、insert into 表(学号,课程号,成绩) values(200901001,102,88) 6、delete from 表 where xh=200901001... |
