An MDF file is a SQL Server database file used to store data. You edit the MDF file by logging in to the SQL Server and editing the data in the tables. This is accomplished using the SQL Server Management Studio. An MDF file can be a very large file if you have several millions of rows in the database tables, but SQL Server edits and adds data in only seconds. update customer set last_name=‘Smiths’ where last_name=‘Smith’ In this statement, any customer with a last name of “Smith” is changed to “Smiths.” Writer Bio
