simple SQL validation

[d-machine]

Hi

I have a signup form for a my site, it includes username, password and email. I wanted to check that if the username or the email is already exist in my DB so It will write "this username or email is already in use"

otherwise it should sign him to the site.

I succeeded on making the signinig part, but not the validation.

Can someone help me?

Thanks

[boogyman]

just do a selection query for the username / email and if it returns a value then its already in use

if(mysql_query("SELECT username, email FROM Users WHERE username='_something_' OR email='_something_'"))
{
   $error = "Username already in use";
} 

[d-machine]

just do a selection query for the username / email and if it returns a value then its already in use

if(mysql_query("SELECT username, email FROM Users WHERE username='_something_' OR email='_something_'"))
{
   $error = "Username already in use";
} 

Hi thank you for your help but I was needed it in SQL, cause I'm using ASP and Access.