SalesForce Certified Data Cloud Accredited Professional Certified Data Cloud Accredited Professional 09 31Oct2024 - Practice Quiz

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Question 1 of 30

A data analyst is tasked with optimizing a complex SQL query that retrieves customer purchase data from a large database. The original query takes an excessive amount of time to execute, primarily due to the lack of proper indexing and the use of subqueries. The analyst decides to implement several optimization techniques. Which of the following strategies would most effectively enhance the performance of the query while ensuring that the results remain accurate?

Implementing appropriate indexing on the columns used in the WHERE clause and JOIN conditions, and rewriting subqueries as JOINs where applicable.

Increasing the server's hardware specifications to improve processing speed without altering the query structure.

Simplifying the query by removing all GROUP BY clauses, even if it means losing necessary aggregation.

Running the query during off-peak hours to reduce competition for resources, while keeping the original query structure intact.

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