摘要: 查所有数据 select * from table; 查询带条件 select * from table where 1=1; 查询分组 select field from table group by field; 查询嵌套子查询 select * from (select * from tabl 阅读全文
posted @ 2020-09-18 09:36 张永峰z 阅读(155) 评论(0) 推荐(0) 编辑