Delete the php code for repeated records in the mysql database

Delete the php code for repeated records in the mysql database

This article introduces how to use php to delete a code example of repeated records in a mysql database. For more information, see. Method: create a new table and directly import non-duplicate data records. The database used in this article is test_db, and the temporary table is test_tab. Example: Note: pay attention to the usage of the set_time_limit () function. if there is a large amount of data, it may Time Out. use this function to set a timeout limit.