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SQL Interview Preparation—Intermediate Level

Question: Aggregate Window Function

Explore how to apply aggregate window functions in SQL to calculate total sales transactions by month. This lesson helps you understand window functions for real-world sales data analysis, enhancing your ability to write efficient queries for data summarization and preparing for intermediate SQL interviews.

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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  ...