ARRAY_AGG in SQL Server - Examples & AI Generator

ARRAY_AGG simplifies data aggregation in SQL Server by grouping values into arrays—a feature often needed but tricky to code from memory, especially when switching between databases like PostgreSQL or MySQL. SQL Server developers and analysts often need to collect row values into a single array for reporting, but remembering the exact SQL Server ARRAY_AGG syntax can be a challenge. AI2sql provides instant, no-coding solutions, letting you generate complex ARRAY_AGG SQL Server queries from plain English prompts—quickly and without syntax errors.

ARRAY_AGG Syntax in SQL Server

ARRAY_AGG is available from SQL Server 2017 (v14.x) onwards. The function aggregates values from multiple rows into a single array:

SELECT ARRAY_AGG(column_expression) [WITHIN GROUP (ORDER BY column_expression)]
FROM table_name
[WHERE condition];

• column_expression: Value/field to aggregate (e.g., customer name, product ID).

• WITHIN GROUP is optional for ordering.

ARRAY_AGG Examples You Can Generate Instantly

Below are SQL Server ARRAY_AGG examples you can copy and modify. Save time with instant query generation from AI2sql.

1. Aggregate All Products per Order

SELECT OrderID, ARRAY_AGG(ProductName) AS ProductsOrdered
FROM Orders
JOIN OrderDetails ON Orders.OrderID = OrderDetails.OrderID
GROUP BY Orders.OrderID;

Business scenario: List all products bought in each order as arrays.

2. Collect Employee Emails by Department (Ordered)

SELECT Department, ARRAY_AGG(Email) WITHIN GROUP (ORDER BY Email ASC) AS EmployeeEmails
FROM Employees
GROUP BY Department;

Business scenario: Get each department's employees as an ordered array of emails.

3. List Customer Locations per Region

SELECT Region, ARRAY_AGG(DISTINCT City) AS Cities
FROM Customers
GROUP BY Region;

Business scenario: Aggregate unique customer cities per region.

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• Instant generation: Go from business question to production-ready ARRAY_AGG queries in seconds.

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FAQ: ARRAY_AGG in SQL Server

Can I use ARRAY_AGG in SQL Server 2016 or earlier?

No, ARRAY_AGG is supported starting with SQL Server 2017 (v14.x) and later.

Is the ARRAY_AGG result always an array?

Yes, ARRAY_AGG returns a single array value for the group or result set.

Can I remove duplicates inside the ARRAY_AGG result?

Yes, use ARRAY_AGG(DISTINCT column) for unique values.

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