CTE vs Temporary Tables: How to Choose the Right SQL Tool for Your Query

CTEs and temporary tables both handle intermediate datasets in SQL, but they differ significantly in behavior and best use cases. A CTE is a named subquery that exists only for the duration of a single SQL statement, making it ideal for improving query readability and supporting recursion. Temporary tables, by contrast, physically store data in the database's temporary storage and persist throughout a session, allowing indexes to be created and results to be reused multiple times. For large datasets or complex stored procedures requiring multiple reads of the same data, temporary tables generally offer better performance. Developers are advised to use CTEs for clean, readable queries and temporary tables when performance and data reuse are the priority.