用于获取给定日期范围的总计的SQL语句

Question

我想在给定的日期范围内每天按日期获取预订数量及其总价值。

我的表格如下：

BookingId (int)
BookingFare (decimal)
BookingDateTime (datetime)

我只能使用以下方法将BookingDateTime转换为日期：

SELECT CONVERT(varchar(8), BookingDateTime, 112) as BookingDateOnly
FROM   [TaxiBookingOnline].[dbo].[Bookings]

我所追求的是这样的：

Date         Bookings   Value
2013-07-10   10         256.24
2013-07-11   12         321.44
2013-07-12   14         311.53

我觉得我应该对表格进行别名，将其加入到自身然后使用“GROUP BY”但我无法使其工作。

非常感谢任何帮助。

感谢。

Answer 1

怎么样

select
   cast(BookingDateTime as date) [Date],
   count(*) [Bookings],
   sum(BookingFare) [Value]
from t
group by cast(BookingDateTime as date)

Answer 2

SELECT   CONVERT(VARCHAR(8), BookingsDateTime, 112) AS [Date],
         COUNT(*)  AS [Bookings],
         SUM(BookingsFare AS [Value]
FROM     MyTable
GROUP BY DATEADD(dd, 0, DATEDIFF(dd, 0, BookingDateTime))

按SELECT DATEADD(dd, 0, DATEDIFF(dd, 0, dateColumn))分组，有效获取datetime的日期部分，然后您可以根据需要对分组值使用count或sum。

编辑：如果您使用的是SQL Server＆gt; = 2008，则可以转换为date（就像@AlexK已经完成的那样），否则您必须使用DATEADD进行攻击。

Answer 3

以下是代码。将Date1和Date2替换为日期范围值：

SELECT 
CONVERT(varchar(8), BookingDateTime, 112) as BookingDateOnly, BookingID   Bookings,Sum(BookingFare)Value  
FROM 
[TaxiBookingOnline].[dbo].[Bookings]
WHERE BookingDateTime Between 'Date1' and 'Date2'
GROUP BY
BookingDateTime,BookingID

Answer 4

SELECT
    CONVERT(DATE,BookingDateTime) BookingDate,
    COUNT(BookingID) Bookings,
    SUM(BookingFare) BookingFare
FROM TaxiBookingOnline.dbo.Bookings