文章标题关系数据库标准语言SQL-2

链接查询：涉及多个表的查询 链接谓词：用来链接两个表的条件web 等值查询： select Student.*， SC.* from Student，SC where Student.Sno = SC.Sno sql 嵌套查询： select Sname from Student where Sno in（select Sno from SC where Cno=‘2’）；svg ANY 大于子查

>>阅读原文<<