按日期、月份、年份查询数据库

Question

如何按日期查询订单。

像这样：

周、月、年……都一样吗？

Answer 1

没有样本数据我需要猜测，但你想要聚合。

持续数天：

SELECT CAST(OrderDate as DATE), as 'Date'
       COUNT(*) as 'Orders', 
       SUM(OrderPaidAmt) as 'TotalAmpunt'
FROM OrderTable
GROUP BY CAST(OrderDate as DATE)

数周或数月，您需要对DATEPART输出进行聚合：

SELECT DATEPART(WEEK, OrderDate) as 'Week',
       COUNT(*) as 'Orders', 
       SUM(OrderPaidAmt) as 'TotalAmpunt'
FROM OrderTable
WHERE YEAR(Orderdate) = YEAR(GETDATE())
GROUP BY CAST(OrderDate as DATE)

我WHERE在第二个中添加了该条款，仅从今年开始显示。如果您想查看多个年份，您还需要查看订单日期GROUP BY的YEAR()值。