傻笨猪

摘要： select * from studentmarksselect * from coursesselect *from studentsinsert into studentmarks values (5,2,2,1005,66,2)insert into studentmarks values (6,1,1,1006,77,2)--多列排序：先对指定第一列进行排序--如第一列值相等，再用第二列进行排序select * from studentmarks order by courseID,chengji--根据条件查询语句select *from students where Address 阅读全文