A Better Query Language: BQL Language Specification (2014)

This language is a strict superset of SQL (and compiles to SQL), with some features to improve composability and programmer experience.

The Github repository is https://github.com/lelandrichardson/BQL

Unfortunately, the project was abandoned shortly after this blog post (there's an umerged PR for fixing the build if someone wants to check out). But, I think the idea has a lot of potential to fix some of SQL warts.