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  3. Improving Query Performance in SQL Server

Exercise

STATISTICS TIME in queries

A friend is writing a training course on how the command STATISTICS TIME can be used to tune query performance and asks for your help to complete a presentation. He requires two queries that return NBA team details where the host city had a 2017 population of more than two million.

NBA team details can be queried from the NBA Season 2017-2018 database and city populations can be queried by adding in tables from the Earthquakes database.

Each query uses a different filter on the Teams table.

Query 1

  • Filters the Teams table using IN and three sub-queries

Query 2

  • Filters the Teams table using EXISTS

Instructions 1/4

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  • Turn on STATISTICS TIME.