MySQL

Use the following SQL statement for finding duplicates in a table. I think this should work for any relational database, not only MySQL.

When you are using MS SQL Server in mixed mode, it is very important that you know your SA password.

Login into SQL Server using Windows Authentication.

In Object Explorer, open Security folder, open Logins folder. Right Click on SA account and go to Properties.

To find out the version of MySQL server using command line on localhost run the following:

This tutorial explains how you can set, change and reset (if you've forgotten the password) MySQL root passwords.

To delete a column from a MySQL table run the following command: