使用SQL计算故障单打开的小时数

Question

  

可能重复：
  Calculate open hours

到目前为止，我正在使用SQL查询来计算投诉的“开放时间”complaintdate。

Select datediff(hour, 
  Convert(DateTime, 
    Convert(DateTime, 
      Convert(nVarChar, cast(complaintdate as datetime), 101)
    ) + '' +
    Convert(varchar, complainttime, 114)
  ), 
  dateadd(mi, 330, GETUTCDATE())
) as [Open Hours] from complaintregister

获取专栏

Open Hours
15139
15070
15070
15070
15070
100
300
200
400

我希望开放时间只有500多个

Answer 1

这是一个简单的方法：

select * from ( Select datediff(hour, 
      Convert(DateTime, 
        Convert(DateTime, 
          Convert(nVarChar, cast(complaintdate as datetime), 101)
        ) + '' +
        Convert(varchar, complainttime, 114)
      ), 
      dateadd(mi, 330, GETUTCDATE())
    ) as [Open Hours] from complaintregister ) t where t.[Open Hours]>500