原文:SQL查询返回去除重复数据的结果集

方法一: select from tablename where id in select id from tablename group by id having count id gt 方法二: select DISTINCT t. from select from Goods g t ...

2017-12-25 16:50 0 955 推荐指数:

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sql 查询重复数据

数据库中某表中,存在着些相同的记录,如何能用SQL语句,删除掉重复的呢1、查找表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断select * from peoplewhere peopleId in (select peopleId from people group ...

Wed Aug 24 22:39:00 CST 2022 0 2175
SQL查询重复数据

select user_id from dt_orders where datatype=10 and status=3 group by user_id having count(*)>1 ...

Thu Oct 26 23:33:00 CST 2017 0 15172
sql语句查询去除重复语句的结果

返回operation表中time列的唯一值 语句1 select time from operation group by time having count(time) > 1 语句2 select distinct time from operation; ...

Sat Jan 06 04:27:00 CST 2018 0 7172
SQL Server查询重复数据

1.查询单列重复(table:表名,name 字段名): select * from table where name in (select name from table group by name having count(name) > 1) 2.查询多列重复(table:表名 ...

Sat Mar 30 21:40:00 CST 2019 0 3119
SQL查询去掉重复数据

去掉重复数据的方法: 第一种:distinct 根据单个字段去重,能精确去重; 作用在多个字段时,只有当这几个字段的完全相同时,才能去重; 关键字distinct只能放在SQL语句中的第一个,才会起作用 上图举例说明:图中student_name 为 test ...

Mon Jun 28 00:19:00 CST 2021 0 971
 
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