Mastering SQL - PostgreSQL: Performing Aggregations – Total, Group, and HAVING Clause

Master SQL aggregations with this comprehensive tutorial on PostgreSQL! Learn how to perform global aggregations, group-by aggregations, and advanced filtering with the HAVING clause. This video is designed to help beginners and experienced users write optimized SQL queries for data analysis and reporting. What you’ll learn: ✔ Difference between global (total) and group-by aggregations. ✔ Using aggregate functions like SUM, COUNT, MIN, MAX, and AVG. ✔ Grouping data by keys such as dates, products, or categories. ✔ Filtering aggregated data with the HAVING clause. ✔ Best practices and query execution order in SQL. Timestamps * 0:00 - Introduction to SQL aggregations * 0:40 - Group-by aggregations: Grouping data by keys * 1:36 - Joining tables for advanced aggregations * 1:51 - Filtering aggregated data with the HAVING clause * 2:29 - Rules for using GROUP BY and HAVING * 3:34 - Query execution order in SQL (FROM, WHERE, GROUP BY, HAVING, SELECT, ORDER BY) * 4:36 - Example: Counting total orders in a dataset * 6:07 - Example: Aggregating order revenue by date * 7:08 - Example: Calculating daily product revenue * 8:51 - Using HAVING for filtering aggregated results * 9:33 - Sorting data with ORDER BY after aggregation * 10:49 - Validating queries for accurate results Continue Your Learning Journey with PostgreSQL! 🚀 ✅ Previous Video: https://youtu.be/U050biNag4w?si=bgYQdoaoNIoFLg4R ✅ Next Video: https://youtu.be/kI-y9WNhiv8?feature=shared ✅ Full Course: https://youtube.com/playlist?list=PLf0swTFhTI8oQNiY2ZTf81zvKB7-y3y4e&feature=shared Connect with Us: * Newsletter: http://notifyme.itversity.com * LinkedIn: https://www.linkedin.com/company/itversity/ * Facebook: https://www.facebook.com/itversity * Twitter: https://twitter.com/itversity * Instagram: https://www.instagram.com/itversity/ 👉 Don’t forget to subscribe to https://www.youtube.com/itversityin YouTube channel for more tutorials! #sql #database #postgresql #sqlaggregation #sqlqueries