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CREATE TABLE sales ( id int auto_increment primary key, time_stamp TIMESTAMP, product VARCHAR(255), sales_quantity INT ); INSERT INTO sales (time_stamp, product, sales_quantity) VALUES ("2020-01-14 07:15:30", "Product_A", "100"), ("2020-01-14 07:15:30", "Product_B", "300"), ("2020-01-14 07:18:45", "Product_A", "200"), ("2020-01-14 07:18:45", "Product_B", "900"), ("2020-01-15 07:19:23", "Product_A", "400"), ("2020-01-15 07:19:23", "Product_B", "270"), ("2020-01-15 07:45:10", "Product_A", "900"), ("2020-01-15 07:45:10", "Product_B", "340");
SELECT DISTINCT DATE(s.time_stamp) time_stamp, FIRST_VALUE(SUM(s.sales_quantity)) OVER (PARTITION BY DATE(s.time_stamp) ORDER BY s.time_stamp DESC) sales_quantity FROM sales s GROUP BY s.time_stamp;
time_stamp
sales_quantity
2020-01-14
1100
2020-01-15
1240