查詢總結二邏輯操作符or+排序desc

#使用邏輯操作符號

工資大於500或者崗位為manager,同時還要滿足姓名首字元為大寫J

select * from emp where( sal>500 or job=’manager’) and ename like ‘J%’;

#工資從低到高，升序

select * from emp order by sal;

#工資從高到低，降序

select * from emp order by sal desc;

#部門號升序而僱員的工資降序排列

select sal,ename,deptno from emp order by deptno, sal desc

#入職時間降序

select sal,ename,deptno,hiredate from emp order by deptno, hiredate desc

#使用列的別名排序

select ename,(sal+nvl(comm,0)*12) “年薪” from emp order by “年薪”