Postgres Series #30 – GROUP BY explained visually (Dividing rows into categories)
Автор: Inno Sufiyan
Загружено: 2026-03-03
Просмотров: 22
Описание:
In Postgres Series #30, we focus on understanding the core idea behind GROUP BY.
Instead of memorizing queries, we explain how SQL divides rows into categories when using GROUP BY.
In this video, we cover:
What GROUP BY really does
How rows are divided into categories
Visual explanation of grouped data
Combining GROUP BY with aggregate functions
Real-world examples
Common beginner mistakes
We demonstrate everything using PostgreSQL.
💡 This topic is critical for:
Data analysis
Reporting systems
Backend dashboards
SQL interviews
📌 Watch till the end — once you understand grouping conceptually, SQL queries become much easier.
👍 Like if GROUP BY finally makes sense
🔔 Subscribe for the complete Postgres mastery series
💬 Comment: Grouping concept pehle confusing tha?
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