獲取今天，本週，本月和今年的數據在MySQL中的單個查詢？

Question

我從數據庫檢索今天的數據，我想檢索本月，今年的數據以及是否有可能在單個查詢？或者我應該爲每個項目單獨查詢？ 下面我給出的查詢，

select sum(it.rate * it.quantity)as sales from invoices i 
join invoice_items it on i.id = it.invoice_id 
where i.invoice_date > DATE_SUB(NOW(), INTERVAL 1 DAY) 

Answer 1

使用條件彙總：

select sum(case when i.invoice_date > DATE_SUB(NOW(), INTERVAL 1 DAY) then it.rate * it.quantity 
      end) as sales_1day, 
     sum(case when i.invoice_date > DATE_SUB(NOW(), INTERVAL 7 DAY) then it.rate * it.quantity 
      end) as sales_7day, 
     sum(case when i.invoice_date > DATE_SUB(NOW(), INTERVAL 1 MONTH) then it.rate * it.quantity 
      end) as sales_1month, 
     sum(case when i.invoice_date > DATE_SUB(NOW(), INTERVAL 1 YEAR) then it.rate * it.quantity 
      end) as sales_1year  
from invoices i join 
    invoice_items it 
    on i.id = it.invoice_id