Question

If I have two tables in a MySQL database that both have a column called order_number, given an order_number value but not knowing which table it comes from how would I go about setting up a query that would return the name of the table it was found in?

I am particularly interested in the name of the table so I can set up subsequent updates to that table.

Also, I am using PHP for the handling of the query.

Answer 1

select "tableA" as tableName,order_number from tableA where order_number=5
UNION
select "tableB" as tableName,order_number from tableB where order_number=5;