Question

I currently have a table with the two columns, one for Date, and one for Datetime.
These are stored as nominal values, and is defined as the number of days since 12/30/1899, i.e. NOM_DATE 0 = 12/30/1899. Moment is defined as the number of minutes since 12/30/1899 12:00am (GMT), i.e. MOMENT 0 = 12/30/1899 12:00am.

My question is how would I go ahead and convert these into actual dates like dd/mm/yy,
using a stored procedure?

Answer 1

Something like this should be standard

DATEADD(minute, Moment, DATEADD(days, NOM_DATE , '18991230'))

This assume Moment is for intraday (relative) only (that is, at most 1439).

Edit, after comment

If it is 2 separate columns to be converted (is it NOM_DATE?)

DATEADD(minute, Moment, '18991230')

DATEADD(days, NOM_DATE, '18991230')