LISTAGG in PostgreSQL - Examples & AI Generator

The LISTAGG function in PostgreSQL is a powerful way to concatenate values from multiple rows into a single, delimited string. But its syntax—especially with window functions and ordered results—can be complex and time-consuming to memorize or adapt between database platforms. AI2sql removes this friction instantly, letting you turn natural language into production-ready PostgreSQL LISTAGG queries—with no coding required.

LISTAGG Syntax in PostgreSQL

Basic Syntax

LISTAGG(column, delimiter) WITHIN GROUP (ORDER BY column [ASC|DESC]) [OVER (...)]

• column: Data you want to concatenate.

• delimiter: String separator (e.g., ', ').

• WITHIN GROUP: Mandatory ordering for concatenation.

• OVER: Used for windowed aggregations (optional).

Note: PostgreSQL requires WITHIN GROUP (ORDER BY ...) for LISTAGG, differing from some databases.

LISTAGG Examples You Can Generate Instantly

Example 1: Product Names by Category

SELECT category_id, LISTAGG(product_name, ', ') WITHIN GROUP (ORDER BY product_name) AS products
FROM products
GROUP BY category_id;

Get a comma-separated list of products for each category. Perfect for business dashboards.

Example 2: Customer Emails by Country

SELECT country, LISTAGG(email, '; ') WITHIN GROUP (ORDER BY email DESC) AS all_emails
FROM customers
GROUP BY country;

Creates a semicolon-delimited, ordered email list for each country—ideal for regional campaigns.

Example 3: Recent Orders by Customer (Last 30 Days Only)

SELECT customer_id,
       LISTAGG(order_id::text, '|') WITHIN GROUP (ORDER BY order_date DESC) AS recent_order_ids
FROM orders
WHERE order_date >= CURRENT_DATE - INTERVAL '30 days'
GROUP BY customer_id;

Retrieve all order IDs (pipe-separated) for each customer within the past month for targeted follow-up.

Generate LISTAGG queries in 10 seconds with AI2sql

Why Use AI2sql Instead of Manual LISTAGG Coding

• No coding required: Explain your data goal in plain English—AI2sql writes flawless, PostgreSQL-compliant LISTAGG queries.

• Instant generation: Save hours hunting for correct PostgreSQL LISTAGG syntax, especially when switching from other databases.

• Consistent, optimized output: Trusted by 50,000+ users across 80+ countries for accuracy and speed.

Ready to skip tedious syntax and focus on insights? Try AI2sql Generator or Learn LISTAGG in detail.

Conclusion

Mastering LISTAGG in PostgreSQL doesn’t have to mean memorizing complex SQL or worrying about database-specific quirks. With AI2sql, you get instant, production-ready LISTAGG PostgreSQL examples—no manual coding, no syntax errors, just the results you need. Generate Your First Query Now in just 10 seconds and accelerate your analytics workflow.