Exercise

SQL and Parquet

Parquet files are perfect as a backing data store for SQL queries in Spark. While it is possible to run the same queries directly via Spark's Python functions, sometimes it's easier to run SQL queries alongside the Python options.

For this example, we're going to read in the Parquet file we created in the last exercise and register it as a SQL table. Once registered, we'll run a quick query against the table (aka, the Parquet file).

The spark object and the AA_DFW_ALL.parquet file are available for you automatically.

Instructions

100 XP

Import the AA_DFW_ALL.parquet file into flights_df.
Use the createOrReplaceTempView method to alias the flights table.
Run a Spark SQL query against the flights table.