Hi Jonathan, The SQL Expression is not a full SELECT / SQL statement. It's just a replacement for a formula, where instead of Crystal doing the processing after retrieving the data, you're forcing the database to do the processing BEFORE returning the results to Crystal. An example would be a MONTH(datefield) function. Take a look at slide 32 of this presentation: https://www.lawsonguru.co...0Crystal.pdf#search="sql expressions"