if condition with stored procedure

i am trying to use INSERT statement based on some condition not WHERE but using IF condition on the database. something like
INSERT INTO table1 if id = @.id or order = @.fdfdfd.

i think it will return no of rows affected with insert statement. am i right?
any help will be appreciated.First of all, i am not clear with your question.

If you want to insert based on some condition, then specify the insert statment inside an if statement.

Regards
Ravi