delete duplicate records in mysql query

ObjectiveThis article mainly introduces to you about MySQL query, delete duplicate record of method, share out for everyone reference study, below to see detailed introduction:Find records for all repeating headings:? 1

If you like these articles, click here to subscribe to this BlogMySQL Method for querying and deleting duplicate records (1) 1. Find excess duplicate records in the Table. duplicate records are based on a single field (peopleId) select *

This article summarizes the various SQL statements used to delete duplicate records in the mysql database. The following describes the operation methods with examples. For more information, see. This article summarizes the various SQL statements

MySQL database, often encounter duplicate records, then need to delete duplicate records SQL, the following list of four ways to delete duplicate records, for different situations, I hope to help you. 1, look for redundant records in the table,

How to query and delete duplicate records(1)1. Search for redundant duplicate records in the Table. duplicate records are determined based on a single field (peopleid ).Select * from peopleWhere peopleid in (select peopleid from people group by

Ways to query and delete duplicate records1, look for redundant records in the table, duplicate records are based on a single field (Peopleid) to determineSELECT * from people where Peopleid in (select Peopleid from People GROUP by Peopleid have

This article uses an example to illustrate how to delete duplicate database records in mysql. if you need it, refer to the example. This article uses an example to illustrate how to delete duplicate database records in mysql. if you need it, refer

Method 1 Delete yourtable where [id] not in ( Select MAX ([id]) from yourtable Group by (name + Valu) E) Method 2 Delete a from table a LEFT join ( Select (ID) from table GROUP by Name,value ) b on A.id=b.id Where b.id is null Query and

This article uses an example to illustrate how to delete duplicate database records in mysql. If you need it, refer to the example. Demo data Table Structure:   The Code is as follows: Copy code Mysql> desc demo;+ ------- + --

Although the SQL statements for querying and deleting duplicate records are messy, the content is still good. Although the SQL statements for querying and deleting duplicate records are messy, the content is still good. For example: Id name value 1