Also one of the bigger reasons why i dislike SQL abstractions: you usually pick your RDBMS for a reason, because of some vendor-specific features, extensions or something. Abstracting SQL away makes end up with the smallest common denominator which defeats the purpose of choosing one specific RDMBS.
So whenever you have reasons to spend some thoughs on the choice of RDBMS, you'll probably not want to abstract SQL away.
So whenever you have reasons to spend some thoughs on the choice of RDBMS, you'll probably not want to abstract SQL away.