摘要: select sysdate from dual;select round(sysdate - hiredate) from emp; select * from emp; select round(1.8) from dual; --round 四舍五入select trunc(1.8) from 阅读全文
posted @ 2021-03-09 03:20 就让文谦先行 阅读(96) 评论(0) 推荐(0) 编辑