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Calculated time difference column in create table

  • July 14, 2015 at 4:02 am

    #318979

    Hi,

    Can someone please advise on how to include a time difference column using 2 other date columns during creation of a table ?

    The requirement is to create a table and include the following columns:

    1.Downtime start date & time

    2.Downtime end date & time

    3.Downtime Duration in hh:mm (calculated date difference between column 1 and 2)

    Thanks for your time.

  • July 14, 2015 at 4:13 am

    #1812250

    I would advise you to calculate the time difference in minutes. You can display it as hh:mm in your presentation layer. That said, what is it specifically you don't understand - how to calculate a time difference, how to include a computed column in a table definition, or something else?

    John

  • July 14, 2015 at 4:15 am

    #1812252

    John Mitchell-245523 (7/14/2015)

    I would advise you to calculate the time difference in minutes. You can display it as hh:mm in your presentation layer. That said, what is it specifically you don't understand - how to calculate a time difference, how to include a computed column in a table definition, or something else?

    John

    Thanks for your reply.

    Actually I need the advise on both - calculating the time difference and including a computed column (hh:mm) in table definition.

    Thanks.

  • July 14, 2015 at 4:39 am

    #1812256

    OK, for the former, use DATEDIFF. For the latter, look at the CREATE TABLE documentation. Search on that page for "computed_column_expression". Please post back if there's anything you don't understand.

    John

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