How to delete duplicated records in MS SQL Server?

Databases, Programming

First, create one demo table Let’s create one demo table first. It will be called Person and will hold some fictive person data. Now, fill the data Insert some fictive person data and do some duplicated records that have the same values for fieldsĀ  firstname, lastname and email. Now the magic Use this subquery trick to extract duplicate records and then delete them. Notice the use of PARTITTION and WITH Transact-SQL keywords. All records that have RowNumber > 1 are deleted.