This SQL Constraint allows to check that one of the fields between field2_id, field3_id and field4_id must be not null. I checked the whole Drift documentation but bumped only in check constraints for ...

One of the trickier aspects of application development is dealing with null or nonexistent data. Tony Patton takes a closer look at null values in the .NET framework.

I'm trying to put together a DTS package to export data from SQL Server (2k) into a CSV file that I can in turn import into MySQL.The problem I'm running into is SQL Server exports NULL values as ...