Advantages of CTE

 • Better Readability: They let you name temporary result sets using the WITH keyword, turning long, nested subqueries into clean, sequential steps.

• Easier Maintenance: You can debug, update, or rewrite specific logical blocks without altering the entire main query.

• Code Reusability: Unlike standard inline subqueries, a single CTE can be referenced multiple times within the same execution statement, reducing code duplication.

• Recursive Capabilities: CTEs can reference themselves, enabling recursive queries to easily traverse hierarchical data like organizational charts, bill-of-materials, or family trees.

• No Permanent Storage: They only live during the execution scope of a single statement, meaning they do not require disk space or manual cleanup like physical temporary tables or permanent views.