Hello guys I'm just a newbie so sorry for my question :)
I already tried using char, tinyint, bool and CHECK constraint.
Here's my CHECK constraint:
CHECK (user_type>=0 AND user_type<=1)
But still I can insert values more than 1, all I want is just 1s and 0s. I'll use it as type of my users. Although I can validate this in front-end level, I still want do it in a database itself.
Thanks in advance :)