PostgreSQL GROUP BY, ORDER BY, HAVING Clauses Explained скачать в хорошем качестве

PostgreSQL GROUP BY, ORDER BY, HAVING Clauses Explained

Welcome to LearnWithMe! In today’s video, you will learn three powerful SQL clauses used for organizing and filtering grouped data in PostgreSQL: ✔️ GROUP BY Used to group rows that have the same values and perform aggregate functions like SUM, COUNT, AVG, MAX, MIN. ✔️ ORDER BY Used to sort records in ascending or descending order. ✔️ HAVING Used to filter groups after applying GROUP BY, especially when using aggregate functions. By the end of this video, you will understand: • How GROUP BY works • When to use ORDER BY • Why HAVING is needed instead of WHERE • Practical examples for beginners If you are learning PostgreSQL or preparing for interviews, this video is perfect for you! Don’t forget to Like, Share & Subscribe for more easy database lessons 💡 #postgresql #sqltutorial #groupby #orderby #having #databasetutorial #learnsql #sqlforbeginners #postgres