SQL子查询语言笔记:子查询的分类 单行的语法 select 字段 from 表 where 字段 >[单行] (子查询)多行 in ,all,any in:表示在一个区间内 select * from emp where ename in ( select ename from emp where sal>2000 ) -SQL:select * from emp where sal>(Select SAL From EMP Where ENA

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