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Adding indexes to databases speeds up the search process.
The database must be connected.
The index is created.
To speed up a search on employee surnames in a database that tracks employee information, and tune the performance of queries against this index, you could create an index called EmployeeNames and increase the hash size to 20 bytes with the following statement:
CREATE INDEX EmployeeNames ON Employees (Surname, GivenName) WITH MAX HASH SIZE 20
This statement creates an index with the default maximum hash size you have configured. To create an index that overrides the default, ensure you use the WITH MAX HASH SIZE value clause to set a new value for this index instance.