摘要: 基础: 增:insert into emp(empno, ename, job, mgr, hiredate, sal) values(9999, 'zhangsan', 'MANAGER', NULL, NULL, 200) 删:delete from emp where comm is null 阅读全文
posted @ 2015-04-05 12:14 Jtianlin 阅读(333) 评论(0) 推荐(0) 编辑