Verify JDBC Results in SOAP Response

I have a JDBC step that returns a list of data from the database. I need to verify that every value in the JDBC result is in the corresponding soap response. I currently have it done with a Datasource loop. This however is inefficient because it calls the soap request for every single entry in the JDBC result. What is the best way to make 1 JDBC call and 1 soap request and verify all of the data? Do I need to do this via a Groovy Script?