2017年7月17日
myonepractice
摘要： select * from EMP where ENAME ='SMITH'; select ename || ' is a ' || job from emp; select distinct empno from emp; select * from emp where COMM>SAL; select COMM+SAL from emp; select * from emp where j... 阅读全文
posted @ 2017-07-17 12:10 kiskistian 阅读(144) 评论(0) 推荐(0)