CTEs (Common Table Expressions)

Common Table Expressions (CTEs) in SQL are named temporary result sets that exist within the scope of a single SELECT, INSERT, UPDATE, DELETE, or MERGE statement. Defined using the WITH clause, CTEs act like virtual tables that can be referenced multiple times within a query. They improve query readability, simplify complex queries by breaking them into manageable parts, and allow for recursive queries. CTEs are particularly useful for hierarchical or graph-like data structures and can enhance query performance in some database systems.

Visit the following resources to learn more:

• @article@Common Table Expressions (CTEs)
• @article@What is a Common Table Expression?