摘要:
select * from emp where sal between 2500 and 5000;--使用between取区间 select * from emp where sal in(2500,5000);--可以指定取想要的数; select * from emp where sal be 阅读全文
摘要:
在芝加哥工作的人中,谁的工资最高 select * from (select e.ename from emp e join dept d on(e.deptno = d.deptno)where d.loc='CHICAGO' order by sal desc) where rownum=1; 阅读全文