ARRAY_AGG in PostgreSQL - Examples & AI Generator

ARRAY_AGG in PostgreSQL lets you aggregate values from multiple rows into an array, enabling concise, compact data retrieval—no manual joins or subqueries needed. However, remembering the exact PostgreSQL ARRAY_AGG syntax can slow you down, especially when deadlines are tight or you’re working across databases. AI2sql solves this by generating production-ready ARRAY_AGG queries instantly from plain English, with no coding required. Stop memorizing syntax and focus on insights—AI2sql supports 50,000+ users in 80+ countries with instant SQL generation tailored for PostgreSQL.

ARRAY_AGG Syntax in PostgreSQL

Basic Syntax

ARRAY_AGG(expression [ORDER BY sort_expression])

- expression: The column or value to aggregate. - ORDER BY: (Optional) Specifies the order of array elements.

PostgreSQL-Specific Notes

  • ARRAY_AGG returns an array data type, unique to PostgreSQL compared to databases like MySQL or SQL Server.

  • ORDER BY clause inside ARRAY_AGG is supported for ordered arrays.

ARRAY_AGG Examples You Can Generate Instantly

Copy, paste, or generate equivalent queries in 10 seconds with AI2sql—no coding skills needed. Business-ready scenarios below:

1. Group Customer Emails by Country

SELECT country, ARRAY_AGG(email) AS emails
FROM customers
GROUP BY country;

Result: Get each country with an array of its customers’ emails.

2. List Products Ordered in Each Order (Sorted by Name)

SELECT order_id, ARRAY_AGG(product_name ORDER BY product_name) AS products
FROM order_items
GROUP BY order_id;

Result: Returns each order with a sorted array of product names.

3. Aggregate Order Dates for Each Customer

SELECT customer_id, ARRAY_AGG(order_date) AS order_dates
FROM orders
GROUP BY customer_id;

Result: Shows each customer with all their order dates as an array.

Generate ARRAY_AGG queries in 10 seconds with AI2sql.

Why Use AI2sql Instead of Manual ARRAY_AGG Coding

  • Save time: No more searching documentation for PostgreSQL ARRAY_AGG syntax—get instant results.

  • Reduce errors: AI2sql produces production-ready code, minimizing costly mistakes.

  • Focus on insights: Skip repetitive coding and turn natural language into optimized SQL in seconds.

  • Trusted by 50,000+ users in 80+ countries.

Frequently Asked Questions

What does ARRAY_AGG do in PostgreSQL?

ARRAY_AGG aggregates column values into a PostgreSQL array, enabling complex analytics and reporting in a single step.

Can I use ORDER BY inside ARRAY_AGG in PostgreSQL?

Yes, you can sort elements within each group using ORDER BY inside ARRAY_AGG.

What’s the fastest way to generate ARRAY_AGG queries?

Use AI2sql’s AI SQL generator for instant, high-quality ARRAY_AGG queries with no coding required.

Takeaway: Don’t get stuck on PostgreSQL ARRAY_AGG syntax. Use AI2sql to generate your first query now and experience 10-second, no-code SQL creation.

  • Try AI2sql Generator

  • Learn ARRAY_AGG

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