按月選擇數據

Question

我需要幫助來選擇每月的數據數量，有4個零售商，我需要選擇每月的總交易量和該月的總額顯示每個月分別在SQL中。

Answer 1

從日期中提取月份並按組進行分組。然後你可以使用聚合函數來總結和計數

select month(date_column), 
     sum(amount) as total_amount, 
     count(*) as transaction_count 
from your_table 
group by month(date_column) 

select month(date_column), 
     sum(amount) as total_amount, 
     count(*) as transaction_count 
from your_table 
group by month(date_column)