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            "title": "Product Sales Analysis IV",
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            "sampleTestCase": "{\"headers\": {\"Sales\": [\"sale_id\", \"product_id\", \"user_id\", \"quantity\"], \"Product\": [\"product_id\", \"price\"]}, \"rows\": {\"Sales\": [[1, 1, 101, 10], [2, 3, 101, 7], [3, 1, 102, 9], [4, 2, 102, 6], [5, 3, 102, 10], [6, 1, 102, 6]], \"Product\": [[1, 10], [2, 25], [3, 15]]}}",
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                "insert into Sales (sale_id, product_id, user_id, quantity) values ('1', '1', '101', '10')",
                "insert into Sales (sale_id, product_id, user_id, quantity) values ('2', '3', '101', '7')",
                "insert into Sales (sale_id, product_id, user_id, quantity) values ('3', '1', '102', '9')",
                "insert into Sales (sale_id, product_id, user_id, quantity) values ('4', '2', '102', '6')",
                "insert into Sales (sale_id, product_id, user_id, quantity) values ('5', '3', '102', '10')",
                "insert into Sales (sale_id, product_id, user_id, quantity) values ('6', '1', '102', '6')",
                "Truncate table Product",
                "insert into Product (product_id, price) values ('1', '10')",
                "insert into Product (product_id, price) values ('2', '25')",
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