To add to the pile of responses: in Scala, Slick is great library that lets you compose sql queries and fragments of queries quite effectively. (http://slick.li

To add to the pile of responses: in Scala, Slick is great library that lets you compose sql queries and fragments of queries quite effectively. (http://slick.lightbend.com/ http://slick.lightbend.com/) At my company we built a UI on top of Slick that lets users of our web app define complex triggers based on dynamic fields and conditions which are translated to type-safe SQL queries.