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Answer: Analyze query patterns and use appropriate index types such as clustered indexes or non-clustered indexes tailored to the query's access patterns.
Analyzing query patterns and using appropriate index types tailored to the query's access patterns is a strategic approach to tuning queries. This method involves understanding the nature of the data and the operations performed by the query, and then selecting or creating indexes that optimize these operations. This tailored approach significantly improves query performance by enhancing the efficiency of data retrieval and manipulation.
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In the context of Azure SQL Data Warehouse, describe how you would tune a query by using indexers to improve its performance. Provide a detailed explanation of the types of indexers that can be used and how they affect the query execution plan.
A
Use clustered columnstore indexes for all tables without considering query specifics.
B
Analyze query patterns and use appropriate index types such as clustered indexes or non-clustered indexes tailored to the query's access patterns.
C
Create a single index for the primary key and use it for all queries.
D
Do not use indexers as they are not effective in improving query performance.
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