ARRAY_AGG in MySQL - Examples & AI Generator

Working with ARRAY_AGG in MySQL can be tricky, especially if you're switching from other databases where syntax and features differ. Learning precise MySQL ARRAY_AGG syntax takes time, and small mistakes can mean hours lost in debugging. With AI2sql, you instantly generate production-ready ARRAY_AGG queries—no coding required. The AI-powered SQL generator is trusted by 50,000+ users across 80+ countries to handle complex SQL in seconds, so you can focus on your data, not on memorizing syntax.

ARRAY_AGG Syntax in MySQL

MySQL ARRAY_AGG Syntax

MySQL introduced the ARRAY_AGG() aggregate function in version 8.0.17. It collects values from grouped rows into a single array. The basic syntax is:

ARRAY_AGG([DISTINCT] expression [ORDER BY expr] [LIMIT n])

• expression: The column or calculation to aggregate.

• DISTINCT: (Optional) Removes duplicate values.

• ORDER BY: (Optional) Specifies order of elements in the array.

• LIMIT: (Optional) Limits elements in the array.

ARRAY_AGG Examples You Can Generate Instantly

1. Aggregate Customer Emails by Country

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

Business use: Get a list of all customer emails for each country.

2. List Products Ordered Per Customer

SELECT customer_id, ARRAY_AGG(DISTINCT product_name ORDER BY product_name) AS ordered_products
FROM orders
GROUP BY customer_id;

Business use: Find all unique products each customer has ordered, sorted alphabetically.

3. Collect All Order IDs Per Sales Rep (with Limit)

SELECT sales_rep_id, ARRAY_AGG(order_id LIMIT 5) AS recent_orders
FROM orders
GROUP BY sales_rep_id;

Business use: For each sales representative, show up to 5 recent order IDs.

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FAQ: ARRAY_AGG in MySQL

• Q: Is ARRAY_AGG available in all MySQL versions?
  A: No, ARRAY_AGG is supported from MySQL 8.0.17 onward.

• Q: Can I use ORDER BY inside ARRAY_AGG in MySQL?
  A: Yes, you can use ORDER BY to sort elements inside the array result.

• Q: What is a key difference from other databases?
  A: MySQL’s ARRAY_AGG supports optional LIMIT and integrates with JSON functions for further processing.

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Conclusion

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