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WITH Users AS ( SELECT 1 AS user_id, 'john' AS name UNION ALL SELECT 2, 'mark' UNION ALL SELECT 3, 'scott' UNION ALL SELECT 4, 'piter' ), user_products AS ( SELECT 1 user_id, 2 AS product_id UNION ALL SELECT 1, 4 UNION ALL SELECT 1, 5 UNION ALL SELECT 2, 4 UNION ALL SELECT 2, 5 UNION ALL SELECT 2, 7 UNION ALL SELECT 3, 1 UNION ALL SELECT 3, 5 UNION ALL SELECT 3, 4 UNION ALL SELECT 3, 2 UNION ALL SELECT 4, 1 ) SELECT u.user_id, u.name FROM user_products up1 INNER JOIN user_products up2 ON up1.product_id = up2.product_id AND up1.user_id <> up2.user_id INNER JOIN Users u ON up1.user_id = u.user_id GROUP BY u.user_id, u.name HAVING COUNT(DISTINCT up1.product_id) > 1;
user_id
name
1
john
2
mark
3
scott