datetime_part()

Extracts the requested date part as an integer value.

Deprecated aliases: datepart()

Syntax

datetime_part(part,datetime)

Learn more about syntax conventions.

Parameters

Name	Type	Required	Description
part	string	✓	Measurement of time to extract from date. See possible values.
date	datetime	✓	The full date from which to extract part.

Possible values of part

• Year
• Quarter
• Month
• week_of_year
• Day
• DayOfYear
• Hour
• Minute
• Second
• Millisecond
• Microsecond
• Nanosecond

Returns

An integer representing the extracted part.

Note

week_of_year returns an integer which represents the week number. The week number is calculated from the first week of a year, which is the one that includes the first Thursday.

Example

Run the query

let dt = datetime(2017-10-30 01:02:03.7654321); 
print 
year = datetime_part("year", dt),
quarter = datetime_part("quarter", dt),
month = datetime_part("month", dt),
weekOfYear = datetime_part("week_of_year", dt),
day = datetime_part("day", dt),
dayOfYear = datetime_part("dayOfYear", dt),
hour = datetime_part("hour", dt),
minute = datetime_part("minute", dt),
second = datetime_part("second", dt),
millisecond = datetime_part("millisecond", dt),
microsecond = datetime_part("microsecond", dt),
nanosecond = datetime_part("nanosecond", dt)

Output

year	quarter	month	weekOfYear	day	dayOfYear	hour	minute	second	millisecond	microsecond	nanosecond
2017	4	10	44	30	303	1	2	3	765	765432	765432100

Note

weekofyear is an obsolete variant of week_of_year part. weekofyear was not ISO 8601 compliant; the first week of a year was defined as the week with the year's first Wednesday in it. week_of_year is ISO 8601 compliant; the first week of a year is defined as the week with the year's first Thursday in it. [For more information], see ISO 8601 week dates.