system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Behind Delta tables is the data stored in Parquet file formats?


assistant
Yes, they are parquet.  Delta API is a protocol and the layer manages the individual parquet files as if they were a larger table.  If BQ can consume from the Delta protocol it could work but I would not suggest reading the files inside of a Delta table as just a parquet table - there would likely be too many stale files