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. To view a list of supported time zone names, run the following command. When an input value includes a time zone, Amazon Redshift uses the time zone to convert the value to UTC and stores the UTC value. The expressions must both contain the specified date or time part. Use the TIMESTAMPTZ data type to input complete timestamp values that include the date, the time of day, and a time zone. 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.
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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 case, the function returns 1 year despite the fact that these dates are only one day apart. In other words, we can say the dateadd () function is used to return the. Basically, the dateadd () function is used to return the new date-time values by adding the required date and timestamp, or we can say the specified date and timestamp as per user requirement.
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For example, suppose that you're calculating the difference in years between two dates, 12-31-2008 and 01-01-2009. For example, the dateadd () is one of the functions provided by Redshift. Specifically, DATEDIFF determines the number of date part boundaries that are crossed between two expressions.For more information, see Date parts for date or timestamp functions. Checking the docs for Amazon Redshift shows this: DATEDIFF ( datepart, )ĭatepart: The specific part of the date or time value (year, month, or day, hour, minute, second, millisecond, or microsecond) that the function operates on.