INTERVIEW QUESTIONS DATABASE SQL SERVER DETAILS

Question: What are "HINTS"? What is "index covering" of a query?

Answer: Hints are options or strategies specified for enforcement by the SQL Server 2005 query processor on SELECT, INSERT, UPDATE, or DELETE statements. The hints override any execution plan the query optimizer might select for a query.

Hints are options or strategies specified for enforcement by the SQL Server 2005 query processor on SELECT, INSERT, UPDATE, or DELETE statements. The hints override any execution plan the query optimizer might select for a query. Source: CoolInterview.com

index covering" of a query means when all the columns used in the select and where clause are used as an index to boost up the performance as data that we need to fetch will be directly picked up by covered index. Source: CoolInterview.com

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