摘要: 1.删除重复,保留一条 id最小 delete from hanshu where id<>(select MIN(id) from hanshu where name='刘丹') and name = '刘丹' 2.查询 WHERE reg_date表中10到50之间数据 SELECT * FRO 阅读全文
posted @ 2019-02-25 16:45 生命不止追求不断 阅读(194) 评论(0) 推荐(0) 编辑