原文:SQL查詢返回去除重復數據的結果集

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 推薦指數:

查看詳情

sql 查詢重復數據

數據庫中某表中,存在着些相同的記錄,如何能用SQL語句,刪除掉重復的呢1、查找表中多余的重復記錄,重復記錄是根據單個字段(peopleId)來判斷select * from peoplewhere peopleId in (select peopleId from people group ...

Wed Aug 24 22:39:00 CST 2022 0 2175
SQL查詢重復數據

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語句查詢去除重復語句的結果

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

Sat Jan 06 04:27:00 CST 2018 0 7172
SQL Server查詢重復數據

1.查詢單列重復(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.查詢多列重復(table:表名 ...

Sat Mar 30 21:40:00 CST 2019 0 3119
SQL查詢去掉重復數據

去掉重復數據的方法: 第一種:distinct 根據單個字段去重,能精確去重; 作用在多個字段時,只有當這幾個字段的完全相同時,才能去重; 關鍵字distinct只能放在SQL語句中的第一個,才會起作用 上圖舉例說明:圖中student_name 為 test ...

Mon Jun 28 00:19:00 CST 2021 0 971
 
粵ICP備18138465號   © 2018-2025 CODEPRJ.COM