SQL EXISTS Generator - Check Records with AI | AI2sql - SQL Query Builder & Generator

EXISTS returns TRUE if a subquery returns any rows. Efficient for checking existence.

SELECT 1 FROM orders o WHERE o.customer_id = c.id

— Using EXISTS (often faster for large datasets)

WHERE EXISTS (SELECT 1 FROM order_items oi WHERE oi.product_id = p.id);

WHERE id IN (SELECT product_id FROM order_items);

WHERE o.customer_id = c.id

AND o.total > 1000

INSERT INTO notifications (user_id, message)

SELECT id, ‘Welcome!’ FROM users u

SELECT 1 FROM notifications n WHERE n.user_id = u.id

AI2sql uses EXISTS for optimal performance.

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