27.05.2012, 16:56
In mysql you can give a timestamp column a default value "CURRENT_TIMESTAMP" if you do that and never alter the column that will store the joindate. The columns type must be timestamp.
EDIT: For some weird reason i thought you wanted it for joindate. I really don't know why
EDIT: For some weird reason i thought you wanted it for joindate. I really don't know why