Job-Ready SQL in an Afternoon - Understanding Query Performance

The video tutorial discusses how to understand and optimize SQL queries. It covers running sample queries, using the EXPLAIN statement to analyze query plans, and understanding how different databases execute queries. The tutorial emphasizes the importance of knowing how databases are set up to optimize query performance effectively.

What is the purpose of running a sample query on the track table?

Explain the significance of the 'EXPLAIN' statement in SQL.

What factors can affect the performance of aggregation functions in different databases?

Discuss the importance of knowing how your database is set up when writing queries.

How can understanding the query plan help in optimizing database queries?