[Jonesy96]

As the previous person said, at least try before coming here.

Here's the logic to help you out:

-User enters /offban [username]
-Using sscanf, you pull the value of username through
-You execute and SQL query searching for that username in your users table
-If user is found, execute SQL query to set their ban value to banned (true if boolean)
-Else SendClientMessage saying that no user exists with that username