It’s TRUE, SQL Supports Booleans | Rails at Scale

However, sometimes queries are complex enough that they need to be written by hand. This can make it difficult for an application to maintain one of the more interesting benefits of using an ORM (Object-Relational Mapping): database agnosticism. Let’s pretend the query above can’t be written with standard Active Record and needs to use some plain SQL. For MySQL, that may look like this:.