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Exercise

Clustered index

Clustered indexes can be added to tables to speed up search operations in queries. You have two copies of the Cities table from the Earthquakes database: one copy has a clustered index on the CountryCode column. The other is not indexed.

You have a query on each table with a different filter condition:

Query 1

  • Returns all rows where the country is either Russia or China.

Query 2

  • Returns all rows where the country is either Jamaica or New Zealand.
Instructions 1/3
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  • Add the two country codes to the filter condition for Query 1.
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