datetime difference as decimal number

[Anonymous]

HI all, I need a column to calculate datetime difference between two datetime columns, enddate - startdate. 

Both columns are in this format 

7/19/2018 8:31:00 AM

I will add conditional columns which will have as condition the result of this datetime difference compared to 0 (>= or <0 )

So I need the result of the differecen to be expressed in (parts of) hours (or minutes) and also be able to show negative results (start date can be bigger than end date) but when datetimes are very close,  I get 0 instead so my conditional columns i create later are not correct. 

So I need your help please, how can I create a new column for  a difference between 2 datetime columns expressed as decimal number which allows also negative values?  

Thanks! 

[v-cherch-msft]

Hi @Anonymous

Could you tell me if your problem has been solved? If it is,kindly mark the helpful answer as a solution if you feel that makes sense.If not, please share more details about your issue so that we could help further on it.

Regards,

Cherie

[Kristjan76 · Accepted solution]

Hi there,

I think DATEDIFF can handle negative numbers now, DATEDIFF(startdate, enddata, HOUR) should work.

The other way of doing this would be to calculate:
(enddate - startdate) * 24 for hour,
(enddate - startdate) * (24 * 60) for minutes,
(enddate - startdate) * (24 * 60 * 60) for seconds.

Best regards,

Kristjan