29 Sep '15, 9pm

Folding Postgres Window Functions into Rails | via @codeship

You’ve heard of window functions in PostgreSQL, but you aren’t quite sure what they are or how to use them. On the surface they seem esoteric, and their use cases are ambiguous. Something concrete would really help cement when window functions are the right tool for the job. We have our work cut out for us! Through this post we’ll see: How to recognize where a window function is helpful. How to implement a scope to introduce window functions. How to use tests to drive a switch from pure Ruby to a window function. “What are Postgres window functions? Let’s make that a little more clear. ” – via @codeship Click To Tweet An Application Use Case for Postgres Window Functions You’ve recently finished shipping a suite of features for an application that helps travelers book golf trips. Things are looking good, and a request comes in from your client: Our application started by b...

Full article: http://blog.codeship.com/folding-postgres-window-function...

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