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SQL Interview Preparation—Intermediate Level

Question: Creating Composite Index

Explore how to create composite indexes on employee ID and month columns to optimize monthly sales queries in a company database. Learn to improve query speed and efficiency using indexing strategies and SQL profiling.

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Question

We have a database for a company that manages information about its employees, the product categories they handle, the products within those categories, and the sales made. The Employees table stores unique identifiers (EID), ...