They mean very little.
More on that after nothing that this is part of T-SQL Tuesday, and you can read the original invitation by clicking on the T-SQL Tuesday 165 invitation or the following images. I almost always forget that this is coming and today is no different. But I wanted to chime in here.
By “very little”, I don’t mean that if you take a job as a DBA, you will likely be repurposed to wash dishes for the CEO’s birthday party. What I mean is that many of the definitions of a DBA and other database professionals have