10 MySQL Common Table Expressions (CTE)

Описание: Welcome back to our SQL Learning Series! In this video, we explore Simple Common Table Expressions (CTEs) in MySQL, a powerful feature that lets you write cleaner, more readable SQL by breaking complex queries into smaller, reusable parts. Perfect for beginners, we focus on simple CTEs without recursion.

What you will learn:

What a Common Table Expression (CTE) is and why it improves query readability and maintainability

The syntax of simple CTEs using the WITH keyword and naming temporary result sets

How to use CTEs to calculate department salaries, total sales, and filter/join data in modular queries

Defining multiple CTEs in a single query for advanced logic breakdown

Best practices like clear naming and modular design to simplify debugging and complex SQL writing

Through practical examples, you’ll see how CTEs make your SQL code neater, easier to understand, and more efficient for data analysis.

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