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SQL Interview Preparation—Intermediate Level

Question: Using JOIN and Aggregate Window Functions

Explore how to write SQL queries that use JOINs and aggregate window functions for analyzing product prices within categories. Understand partitioning data and calculating maximum values without grouping to prepare for intermediate SQL challenges.

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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), employee names, and ages. The ProductCategories table ...