Hi Kaniz, I found the equivalent SQL code for this but it didn't seem to store the operation past the execution. I.e I would run the code to configure settings, then run the troublesome code afterwards and still get the same result. 

The problem has been identified as source data missing a digit for date of birth year, and therefore having results before 1000AD. This has been rectified at source. 

Thank you for your time in answering!