摘要: 基本查询语句及方法 from where group by having distinct order by limit .... 书写顺序格式: select id,name from emp where id > 3 and id < 6; 执行顺序格式: from # 确定到底是哪站表 whe 阅读全文
posted @ 2019-08-21 15:58 泡泡茶壶i 阅读(350) 评论(0) 推荐(0) 编辑