SQL Sum QTY Between Two Dates

I have this sample table: Product | Category | QTY | Load Date ———–+—————+————-+————– 1 Alpha 10 Jan. 1, 2021 2 Beta 20 Jan. 1, 2021 3 Charlie 20 Jan. 1, 2021 1 Alpha 30 Jan. 2, 2021 3 Charlie 30 Jan. 3, 2021 1 Alpha -50 Jan. 4, 2021 2 Beta -20 Jan. 4, 2021 4 Delta 40 Jan. […]