表中所有现有日期的SQL列计数结果

我有一个表DTTransaction和DTHotelTransaction，前者是主键，后者是外键

Columns in DTTransaction  :machinename(varchar),BookedOn(datetime),TransactionID(int) 
Columns in DTHotelTransaction :HCOMCID(int) ,TransactionID 

要求：

对于DTTransaction中的每个BookedOn值，我需要这些（415428415429415430415431415432）HCOMCID的机器名和machinename计数

我正在努力做到：

select DTTransaction.machinename,count(DTTransaction.machinename) from DTTransaction   
join DTHotelReservation on DTTransaction.TransactionID =      
DTHotelReservation.TransactionID
and DTHotelReservation.HCOMCID in (
415428,
415429,
415430,
415431,
415432)
where convert(varchar(10),BookedOn,101)='04/10/2013'
group by DTTransaction.machinename

但是它只会给出一个特定的日期。我想得到所有现有BookedOn值的计数

---

提前感谢。

如果您想要所有日期的总和，只需删除

where

子句：

select DTTransaction.machinename, count(DTTransaction.machinename)
from DTTransaction join
     DTHotelReservation
     on DTTransaction.TransactionID = DTHotelReservation.TransactionID and
        DTHotelReservation.HCOMCID in (415428, 415429, 415430, 415431, 415432)
group by DTTransaction.machinename

如果您希望按日期显示结果，请将其包含在您的

分组依据中。比如说,

select DTTransaction.machinename, convert(varchar(10),BookedOn,101), count(DTTransaction.machinename)
from DTTransaction join
     DTHotelReservation
     on DTTransaction.TransactionID = DTHotelReservation.TransactionID and
        DTHotelReservation.HCOMCID in (415428, 415429, 415430, 415431, 415432)
group by DTTransaction.machinename, convert(varchar(10),BookedOn,101)
order by 1, MAX(BookedOn)

我包含了一个
orderby
子句，因此结果将在每个机器名称中按日期排序