Question

I’m using a mysql database, and I’m trying to insert a record into tableB if the product code already exists in tableA.

I think a CASE statement would work, but I can’t find any further help on the web.
Here is what I have so far:

CASE (SELECT COUNT(*) FROM tableA WHERE tableA.item_code = '$pcode') > 1 
THEN INSERT INTO tableB(item_id, serial_number, used) 
VALUES ('$iid','$sns','$used') END

Any help greatly appreciated.
Cheers

Answer 1

You just need to write a regular old insert statement:

insert into tableB(item_id, serial_number, used)
select '$iid', '$sns', '$used'
where exists (select 1 from tableA where item_code = '$pcode')