February 2024
Intermediate to advanced
456 pages
11h 28m
English
Content preview from Learn T-SQL Querying - Second Edition
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4
Indexing for T-SQL Performance
In the previous chapter, we explored execution plans and the various operators that the SQL Database Engine uses to retrieve the data requested by a query. While the Query Optimizer does most of the heavy lifting when choosing the best way to retrieve the data required to satisfy the query, it can only do so efficiently if the proper indexes are in place.
An index is a structure in the database that speeds up access to data by organizing it in a specific way based on the type of index. The data structure that works best for your application will depend on many factors, including the type of data being stored, the volatility of the data, and the data access patterns that will be used to retrieve the data. The ...
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