![]() Smaller units are not used, so values are not rounded. Used to determine the result and thus determines the precision of the result. The default column name for the DATEDIFF function is DATEDIFF. You can name date parts in full or abbreviate them. DATETRUNC This function can be thought of as date rounding. DATEPART Returns the name of the specified date part as an integer. In this section, you can find information about the date and time scalar functions that Amazon Redshift supports. DATEPARSE Returns specifically formatted strings as dates. DATENAME Returns the name of the specified date part as a discrete string. This example assumes that the current date is June 5, 2008. DATEDIFF Returns the number of date parts (weeks, years, etc) between two dates. month) used to calculate the difference determines which parts of the DATE, TIME, or TIMESTAMP field are The following example finds the difference, in number of quarters, between a literal value in the past and today's date. For more details, including examples, see For example, because the common calendar starts from the year 1, the first decade (decade 1) is through, and the second decade (decade 2) is through. If date_or_time_part is week (or any of its variations), the output is controlled by the WEEK_START session parameter. Amazon Redshift interprets the DECADE or DECADES DATEPART based on the common calendar. The function supports units of years, quarters, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds.ĭate_or_time_part must be one of the values listed in Supported Date and Time Parts. Output values can be negative, for example, -12 days.ĭate_or_time_expr1 and date_or_time_expr2 can be a date, time, or timestamp.
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