Subqueries vs. CTEs in SQL: What They Are and When to Use Each

The article breaks down SQL subqueries as a way to structure complex queries more clearly.

It covers scalar, row, column, table, correlated, and EXISTS/NOT EXISTS subqueries with practical use cases.

Subqueries are presented as an alternative to CTEs for organizing logic in SQL statements.

The key tradeoff is readability and maintainability, with performance sometimes varying by query and database.