Compare that to the regular DATETIME range of Janu– December 31, 9999. The first question you might have about DATETIME2 is “ What’s it’s date range?” It is: We will discuss the following topics about DATETIME2. We will discuss how it is different from regular DATETIME, and also some of the quirky things about DATETIME2 that make it an ideal data type in some situations. In this tutorial, you will get a complete rundown of the DATETIME2 data type. Just like any other data type, there is a time and place where DATETIME2 might be the preferred type to use over other date and time types, like it’s close relative DATETIME. To return the year-as a number from 1000 to 9990-from a date or timestamp, use the YEAR function as YEAR( date_value). For example, SELECT YEAR("") returns 2020.The DATETIME2 data type is one of several data types used to keep track of date and time information, obviously. To return the quarter of the year-as a number from 1 to 4-from a date or timestamp, use the QUARTER function as QUARTER( date_value). For example, SELECT QUARTER("") returns 2. To return the timestamp when the query runs, use the NOW function. To return the month-as a number from 1 to 12-from a date or timestamp, use the MONTH function as MONTH( date_value). For example, SELECT MONTH("") returns 6. For unit, INTERVAL supports the same values as DATE_ADD. To add or subtract interval unit values for a date or timestamp, use INTERVAL function with a + or - operator, such as +/- INTERVAL value unit. To parse an ISO8601-formatted string as a date, use the FROM_ISO8601_DATE function, such as FROM_ISO8601_DATE( date_value). To return the number of the last day of the month from a date or timestamp, use the EOMONTH function, such as EOMONTH( date_value). To return the day of the week-as a number from 1 for Monday to 7 for Sunday-from a date or timestamp, use the DAY_OF_WEEK function as DAY_OF_WEEK( date_value). To return the day of the month-as a number from 1 to 31-from a date or timestamp, use the DAY function as DAY( date_value). Note: To return the day of the week as a number, from 1 to 7, use the DAY_OF_WEEK function. Note: When parsing, %y assumes 1970 to 2069 70 results in 1970, 69 results in 2069. Year for when Monday is the first day of the week used with %v Name of the day of the week, from Sunday to Saturday Week of the year, from 01 to 53, where Monday is the first day of the week used with %x Time on 12-hour clock, as hh:mm:ss followed by AM or PM Numeric month value as a two-digit number, from 01 to 12 Hour of 12-hour clock as a two-digit number, from 00 to 12ĭay of the year as a three-digit number, from 000 to 366 Hour of 24-hour clock as a two-digit number, from 00 to 23 Numeric day of the month as a two-digit number, from 01 to 31 For format, DATE_FORMAT supports a combination of these values: FormatĪbbreviated name of the day of the week, from Sun to Sat To return a date or timestamp value in a set format, use the DATE_FORMAT function as DATE_FORMAT( timestamp, format). Note: To parse an IS08601-formatted string as the date value, use the FROM_ISO8601_DATE function, such as FROM_ISO8601_DATE(''). For example, SELECTĭATE_DIFF('day', "", "") returns 10. For unit, DATE_DIFF supports the same values as DATE_ADD. To return the difference of two date or timestamp values, use the DATE_DIFF function as DATE_DIFF( unit, timestamp1, timestamp 2). For unit, DATE_ADD supports:įor example, SELECT DATE_ADD('day', 10, "") returns. To add an interval unit value to a date or timestamp, use the DATE_ADD function as DATE_ADD( unit, value, timestamp). To convert a value to a date value, use the DATE function as DATE( value). To return the date when the query runs, use the CURRENT_DATE function. 18:00:00.000 America/Los_Angeles Tip: In most areas, you can use America/Los_Angeles for Pacific time zone, America/Denver for Mountain, America/Chicago for Central, and America/New_York for Eastern. SELECT cast(timestamp ' 01:00 UTC' AT TIME ZONE 'America/Los_Angeles' as VARCHAR) For example: SELECT cast(timestamp ' 01:00 UTC' as VARCHAR) To convert the time zone of a timestamp, use the AT TIME ZONE operator. Note: Runtime variables in Chains, such as those used for date and time transformations, use Python strftime rather than Presto SQL. To adjust or perform calculations on date or timestamp values, you may find these common functions useful. When you enter your query in the SQL Editor or create a calculation, you use Presto SQL syntax.
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