GROUP BY in PostgreSQL - Examples & AI Generator

GROUP BY in PostgreSQL lets you summarize or segment data, but knowing the specifics of PostgreSQL GROUP BY syntax can slow you down—especially if you’re switching from other databases. With AI2sql, there’s no need to memorize or troubleshoot GROUP BY statements. Just describe what you need, and AI2sql generates the PostgreSQL query instantly—no coding or adjustment required. It’s designed for data analysts, SQL developers, and engineers who want quick results for tasks like reporting, dashboarding, or data exploration.

GROUP BY Syntax in PostgreSQL

Basic Syntax

SELECT column1, aggregate_function(column2)
FROM table_name
GROUP BY column1;

• GROUP BY can use one or multiple columns

• PostgreSQL requires every selected non-aggregated column to appear in GROUP BY

GROUP BY Examples You Can Generate Instantly

Customers: Count Orders per Customer

SELECT customer_id, COUNT(order_id) AS total_orders
FROM orders
GROUP BY customer_id;

Products: Total Sales by Product

SELECT product_name, SUM(quantity) AS total_sold
FROM sales
GROUP BY product_name;

Orders: Average Order Value by Month

SELECT DATE_TRUNC('month', order_date) AS order_month, AVG(amount) AS avg_order_value
FROM orders
GROUP BY order_month
ORDER BY order_month;

Generate GROUP BY queries in 10 seconds with AI2sql.

Why Use AI2sql Instead of Manual GROUP BY Coding

• No coding required: Describe your data grouping goal; get instant, production-ready SQL

• PostgreSQL specifics handled for you: AI2sql recognizes column requirements and aggregation rules unique to PostgreSQL’s syntax

• Speed: Produce complex queries in 10 seconds—skip the documentation checks and debugging

Join 50,000+ users across 80+ countries who use AI2sql daily to save time on SQL tasks.

Want to do more?

• Try AI2sql Generator

• Learn GROUP BY

Frequently Asked Questions

Does PostgreSQL require all non-aggregated columns in GROUP BY?

Yes. Every column in the SELECT list that isn't used with an aggregate function must be included in the GROUP BY clause in PostgreSQL.

Can I group by multiple columns in PostgreSQL?

Absolutely—you can list multiple columns separated by commas in the GROUP BY clause for multi-level grouping.

How is AI SQL generator faster than writing GROUP BY manually?

AI2sql turns natural language into accurate GROUP BY queries tailored to PostgreSQL syntax—saving minutes or more on every reporting task.

Ready to skip manual GROUP BY coding? Generate your first PostgreSQL query with AI2sql now and experience 10-second, no-code SQL generation for yourself.