JSON_ARRAYAGG in Oracle - Examples & AI Generator

Working with JSON_ARRAYAGG in Oracle lets you aggregate column values into a JSON array—essential for modern analytics and API design. However, crafting the precise Oracle JSON_ARRAYAGG syntax can be tricky, especially if you switch between databases or need production-ready queries fast. That's where AI2sql comes in: generate perfect JSON_ARRAYAGG queries in 10 seconds, no coding required.

JSON_ARRAYAGG Syntax in Oracle

Oracle’s JSON_ARRAYAGG function builds a JSON array from input values in SQL. Here’s the standard Oracle syntax:

JSON_ARRAYAGG([DISTINCT] expression [FORMAT JSON]) [RETURNING data_type] [NULL ON NULL]

• expression: Column or value to aggregate.

• FORMAT JSON: Ensures valid JSON output.

• NULL ON NULL: Controls how NULLs are handled in the array.

Oracle-specific note: Unlike some databases, Oracle emphasizes valid JSON formatting and offers RETURNING options to control output types.

JSON_ARRAYAGG Examples You Can Generate Instantly

Customer Orders as JSON Array

SELECT customer_id, JSON_ARRAYAGG(order_id) AS orders_json
FROM orders
GROUP BY customer_id;

Business context: Get each customer's order IDs as a JSON array—ideal for API responses.

Product Names in Each Category

SELECT category_name, JSON_ARRAYAGG(product_name) AS products_json
FROM products
GROUP BY category_name;

Business context: Return all products per category wrapped in a JSON array for dashboards.

Employee IDs by Department with JSON Formatting

SELECT department_id, JSON_ARRAYAGG(employee_id RETURNING VARCHAR2(1000)) AS employees_json
FROM employees
GROUP BY department_id;

Business context: Produce a JSON array of employee IDs by department while ensuring VARCHAR2 output type.

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FAQ: JSON_ARRAYAGG in Oracle

What is JSON_ARRAYAGG used for in Oracle?

It aggregates scalar values into a single JSON array, streamlining reporting and API design.

How does Oracle JSON_ARRAYAGG differ from other databases?

Oracle provides stricter JSON validation and flexible output types (RETURNING clause), making it unique compared to MySQL or PostgreSQL.

Does AI2sql support Oracle JSON_ARRAYAGG syntax?

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