sql query to find duplicate records in column

table tmp_wrap;Query OK, 0 rows affected (0.05 sec) 2. There is also a very streamlined approach. Find the duplicate and remove the smallest one. The Code is as follows: Delete users_groups as a from users_groups as,(Select *, min (id) from users_groups group by uid having count (1)> 1) As BWhere a. uid = B. uid and a. id> B. id;(7 row (s) affected)(0 MS taken)

9. Filter duplicate records of query results//query employee position type, filter duplicate results SELECT DISTINCT job from EMP; Query employee name and position, if name + position are the same, filter select DISTINCT ename,job

Example of deleting duplicate records in a data table in SQL Server, SQL Server [Project] The users table in the database contains the u_name and u_pwd fields. The u_name contains duplicate items. Now we need to delete duplicate i

There are many ways for SQLServer to search for and delete duplicate records in tables. Below I will list several commonly used SQL statements with good performance. If you need them, please refer to them. There are many ways for SQL Server to find and delete duplicate

Quickly delete duplicate records in SQL Server 2006-07-17 21:53:15Category: SQL Server 　　 Developer's Nightmare-delete duplicate recordsPresumably, every developer has had a similar experience, when querying or statistics of the database will occasionally encou

This article provides a large number of SQL statement statements for deleting duplicate records. If you are worrying about how to delete duplicate data in the database, we provide you with a variety of SQL query statements for del

Let's take a look at how you can use it to delete duplicate records in a table: Copy Code code as follows: If Exists (Select * FROM Tempdb.Information_Schema.Tables Where table_name like ' #Temp% ') Drop Table #temp Create Table #temp ([Id] int, [Name] varchar, [age] int, [SEX] bit default 1) Go Insert into #temp ([Id], [Name], [age], [Sex]) Values (1, ' James ', 25,default) Insert into #t

) in (select peopleId, seq from vitae group by peopleId, seq having Count (*)> 1)And rowid not in (select min (rowid) from vitae group by peopleId, seq having count (*)> 1)5. Search for redundant duplicate records (multiple fields) in the table, excluding records with the smallest rowidCopy codeThe Code is as follows:Select * from vitaeWhere (a. peopleId, a. seq)

How to quickly delete duplicate records in SQL Server Developer nightmare-delete Repeated Records Presumably, every developer has had a similar experience. When querying or collecting statistics on the database, the query and statistics results may be inaccurate due to

tmp_ids; Method 2 Copy duplicate records to the new table, delete the old table, and rename the new table as the old table name. The Code is as follows: Mysql> select * from duplicate where id in (select min (id) from duplicate group by name );+ ---- + ------- +| Id | name |+ ---- + -

Nightmare for Developers--delete duplicate records Presumably every developer has had a similar experience, and when querying or counting the database, the query and statistic results are inaccurate due to duplicate records in the table. The solution to this problem is to de

server| Repeat | Recurring nightmare for Developers--delete duplicate records Presumably every developer has had a similar experience, and when querying or counting the database, the query and statistic results are inaccurate due to duplicate records in the table. The solut

The following is a general t-SQL template for this operation: /* Delete from a from -- delete Table A (a is the referenced table to be deleted)(Select row_number () over -- row_number () over is an auto-incrementing column generated from the beginning.(Partition by repeat column 1, repeat column 2, repeat

This article will introduce to you in detail the summary of SQL statement methods for deleting duplicate records in SQLServer. In general, we will delete the records in two cases, one is a completely repeated record, where all fields are repeated, and the other is a record with dup