Code to Prevent From submitting the existing data in database

[fiztec]

Hye, can anyone help me. i Need a guide or code to prevent user from entering or submitting a data that already existed or already submitted..

So that, when he press submit button it will turn out the result that " this data had already existed" anyone. Help Me

[dagon]

check the values submitted against the existing values in the db.

[fiztec]

i'n still newbie, what is the code?