I've been round and round on the "pure RDBMS" issue, and I have to conclude purity makes little practical difference. Systems and data already have so much "noi

I've been round and round on the "pure RDBMS" issue, and I have to conclude purity makes little practical difference. Systems and data already have so much "noise" for other reasons outside of technology that cleaning up that corner won't change anything. Some purity-centric clauses and changes could be made to SQL if it really mattered, but it won't be the silver bullet of productivity and accuracy that purists claim.