Question

What is the purpose of index in SQL server?

A) It leads to enhance the query performance.
B) It leads to provide an index to a record.
C) It leads to perform fast searches.
D) None of the above
E) All of the above

Answer 1

The purpose of an index in SQL Server is to enhance query performance and allow fast searches by providing a way to index records, making the correct answer E) All of the above.

Step-by-step explanation:

The purpose of an index in SQL Server is multifaceted. Primarily, indices are utilized to enhance the performance of database queries by allowing for faster searches, much like an index in a book helps you to quickly locate specific information. When a query is executed, the SQL Server can use the index to find data swiftly without scanning the entire table. This leads to significant improvements in query performance, primarily in the case of large databases.

Therefore, when considering the options provided:

• A) It leads to enhance the query performance.
• B) It provides an index to a record.
• C) It leads to perform fast searches.

The correct answer would be E) All of the above, as indexes in SQL Server are designed to enhance performance and enable fast searches, essentially serving as a tool to index records within a database.