Databases: Scaling, Sharding and Querying - Jinal Parikh - Confinement Session

As we shift towards data-intensive applications, making our database scalable becomes important. And, with the various ways in which this can be done- things can get tricky!
This talk discusses techniques of scaling, what sharding is, the key design choices and technical challenges associated with sharding, and how we can execute queries on a sharded database - be it SQL or NoSQL.
You'll learn that with proper application analysis, and taking the right decisions- every application can scale.

[FWTteam]

It's one of the best videos I have seen on Sharding. Still not sure, how the query works? Is it like parallel queries on all the shards, if data is distributed across multiple shards?