Question

How can I check in MYSQL PHP if two columns are unique then not insert again, else if just one column is unique then insert, is that even possible to do in php?

EDIT:

Lets say I have a table like this,

userId  |  codeId

And I I send a query like this,

$query = $pdo->prepare('insert into table (userId, codeId) values (?,?)');

So now I want to check if userId and codeId are added already once do not insert again, and if just one is added, then do insert the entire query,

I hope its more understanding.

Answer 1

Set up a unique key for those columns, then the mysql query will FAIL when you try to insert.