SQL Sumif語句請求

Question

我想創建一個列，根據商店列和小時列獲取總小時數。見下表。因此，它會從商店142和總代表1,2從商店356總量可達rep1,2,3然後我也想devide小時後總拿到了貢獻％列

Date store rep hours total cont% 
    -------------------------------------------------- 
    x 142 rep1 5 11 0.45 
    x 142 rep2 2 11 0.18 
    x 142 rep3 4 11 0.36 
    x 356 rep1 4  7 0.57 
    x 356 rep2 3  7 0.42 

謝謝！

Answer 1

你想窗口功能：

select t.*, sum(hours) over (partition by store) as total, 
     t.hours * 1.0/sum(hours) over (partition by store) as cont_percent 
from t;