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Datediff redshift pdf#

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. format A string literal that defines the format of the input string, in terms of its date parts. The DateDiff function used in redshift has three arguments in it, we specify the dates for which we want to find the difference. The usage of the datediff is similar in all the databases except for the parameters that we use in the syntax.

Syntax TODATE ( string, format) TODATE ( string, format, isstrict) Arguments string A string to be converted. Redshift DateDiff is used to find the difference between the specified dates.

Datediff redshift pdf#

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. Amazon Redshift Database Developer Guide TODATE PDF RSS TODATE converts a date represented by a character string to a DATE data type. 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. For example, suppose that you're calculating the difference in years between two dates, 12-31-2008 and 01-01-2009.

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.