Why You Get an Error Querying from a Column Alias and How to Work Around It

Using Alias Columns in the Where Clause with Common Table Expressions (CTEs) in PostgreSQL: A Flexible Solution to Complex Queries.

Understanding Postgres SQL WITH and SORT: Mastering Common Table Expressions (CTEs) for Efficient Data Retrieval.

Understanding PostgreSQL Recursive Functions with the WITH Statement: A Powerful Approach to Hierarchical Queries