If the second date or time is earlier than the first date or time, the result is negative. If the second date or time is later than the first date or time, the result is positive. The expressions must both contain the specified date or time part. If you are finding the difference in hours between two timestamps, 8:30:00 and 10:00:00, the result is 2 hours.ĭate|time|timetz|timestamp: A DATE, TIME, TIMETZ, or TIMESTAMP column or expressions that implicitly convert to a DATE, TIME, TIMETZ, or TIMESTAMP. If you are finding the difference in hours between two timestamps, 01-01-2009 8:30:00 and 01-01-2009 10:00:00, the result is 2 hours. In this section, you can find information about the date and time scalar functions that Amazon Redshift supports. While migrating the code from Redshift you will need to rewrite this function. In this case, the function returns 1 year despite the fact that these dates are only one day apart. DATEDIFF is the equivalent for DATEDIFF with datepart function in Bigquery. For example, suppose that you're calculating the difference in years between two dates, 12-31-2008 and 01-01-2009.
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