CTEs & Temp Tables for Data Summarization: The article explains how to use Common Table Expressions (CTEs) and Temp Tables in SQL to summarize data, particularly for sales and cost reports. Step-by-Step Guide: It provides a detailed example of summarizing recipe data by month and year, including SQL code snippets. Benefits of CTEs and Temp Tables: The article highlights the clarity, readability, reusability, and performance improvements that CTEs offer in complex queries. Practical Example: A practical scenario is used to illustrate the process, making it easier to understand and apply the concepts.