check before insert data in mysql

Hi,

How to do this check entry if exist or not then if not do insert data entry to mysql database.

BR

isset ?

INSERT INTO tbl_name (a,b,c) VALUES(1,2,3) where id not in (select id from tbl_name);

Should do what you're looking for. It's not tested though.

It is better though to use a query to check it exists first.

SELECT NULL FROM ID tbl_name WHERE id=1

If you have one record you know it is in there :)