SQL DATEPART

SQL DATEPART function will extract or display the specified date part from the existing date. This SQL Server Datepart function always returns an integer value. For example, If you want to extract the year, month, or quarter from the existing Date, you can use this and the syntax of the SQL Datepart function

DATEPART (Datepart, Date)

Date: Please specify the valid date as second argument. It can be column, expression or any variable. It is the part of a given date which we are going to display as output. The list of available SQL Server datepart arguments.

Datepart	Abbreviations	Description
year	yy,yyyy	This will display the year value from the given date
quarter	qq, q	This Sql Server Datepart find and display the quarter number
month	mm, m	This will find and display the month number
dayofyear	dy, y	Day of a year number from the user given date (1 to 365)
day	dd, d	Day number from a given date (1 to 31)
week	wk, ww	This Sql Server datepart function will return the Week number
weekday	dw, w	Week days number from the given date (0 as Sunday & 6 as Saturday)
hour	hh	Prints the Hour value.
minute	mi, n	The Minute Value
second	ss, s	Seconds Value
millisecond	ms	Milliseconds Value
microsecond	mcs	Microsecond Value present in it
nanosecond	ns	Prints the Nanoseconds Value.
TZOffset	tz	Prints the Time Zone Offset Value.
ISO_WEEK	isowk, isoww	Returns the ISO Week Number

SQL DATEPART Function Example 1

In this Sql Server Datepart example we are going to declare a variable of datetime2 data type. Let us assign valid date to that variable and perform all the available operation.

We declared one variable and assigned the date and time to that SQL Server variable. The first select statement prints the year value, and the next one prints the month number.

DECLARE @Date datetime2 = '2015-08-25 14:24:04.1234567'
SELECT 'YEAR' AS [DatePart], DATEPART(year, @Date) AS [New Date] 
UNION ALL
SELECT 'QUARTER', DATEPART(quarter, @Date) 
UNION ALL
SELECT 'MONTH', DATEPART(month, @Date) 
UNION ALL
SELECT 'DAYOFYEAR', DATEPART(dayofyear, @Date) 
UNION ALL
SELECT 'DAY', DATEPART(day, @Date) 
UNION ALL
SELECT 'WEEK', DATEPART(week, @Date) 
UNION ALL
SELECT 'WEEKDAY', DATEPART(weekday, @Date) 
UNION ALL
SELECT 'HOUR', DATEPART (hour, @Date) 
UNION ALL
SELECT 'MINUTE', DATEPART(minute, @Date) 
UNION ALL
SELECT 'SECOND', DATEPART(second, @Date) 
UNION ALL
SELECT 'MILLISECOND', DATEPART(millisecond, @Date) 
UNION ALL
SELECT 'MICROSECOND', DATEPART(microsecond, @Date) 
UNION ALL
SELECT 'NANOSECOND',DATEPART(nanosecond, @Date)

DATEPART Function Example 2

In this example, we use one of the custom table to perform SQL Datepart operations on Hire Date column.

SELECT [FirstName] + ' '+ [LastName] AS [Full Name]
      ,[Occupation]
      ,[YearlyIncome]
      ,[HireDate]
      ,DATEPART(year, [HireDate]) AS [YEAR]
      ,DATEPART(quarter, [HireDate]) AS [QUARTER]
      ,DATEPART(month, [HireDate]) AS [MONTH]
      ,DATEPART(day, [HireDate]) AS [DAY]
 FROM [Employee]

It will display the Year value from the HireDate Column

DATEPART(year, [HireDate]) AS [YEAR]

The below Date Function statement will display the Quarter value from the HireDate Column

DATEPART(quarter, [HireDate]) AS [YEAR]