Datepart redshift

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Datepart redshift. This article is about detailed descriptions and examples of the standard Netezza date functions that you can use to manipulate date columns in the Netezza SQL and Netezza stored procedure. In the real word scenarios many application manipulate the date and time data types. Date types are highly formatted and very complicated. Each …

The DATEPART Tableau Function is used to extract or return a portion of a date. To provide the date component, use the first arg. YEAR, MONTH, DAY, and other dates are accepted by this DatePart Tableau function. If you choose Month as the date component, for example, the DatePart Tableau function will return a year from a …

datepart An identifier literal or string of the specific part of the date value (for example, year, month, or day) that the function operates on. For more information, see Date parts for date or timestamp functions . SELECT DATEPART(week, date(date)), MIN(date) in Redshift with the start day being Saturday. I tried using different syntax for SET DATEFIRST but it seems like it's not …About. dbt-expectations is an extension package for dbt, inspired by the Great Expectations package for Python. The intent is to allow dbt users to deploy GE-like tests in their data warehouse directly from dbt, vs having to add another integration with their data warehouse.@zahed - when people ask questions in the comments, it's usually a good idea to edit your question, to make it a better question overall, and to specifically include the information asked for (As e.g. marc_s has to re-tag your question, but you might want to to include your full query, which if marked as code ({}) will also get nice syntax highlighting)DATEPART function is used to return a part of a given date in a numeric value. The part can be the day of the date, month of the date, year of the date etc. For example, we can use the DATEPART function to get the day of a given date to determine whether an order was placed on Sunday or not. Another example is to get the month of a …Problem. Microsoft SQL Server 2008 and earlier versions used the CONVERT functions to handle date formatting in SQL queries, SELECT statements, stored procedures and T-SQL scripts.In this tip, Date and Time Conversions Using SQL Server, we have a list of the available examples on how to use the CONVERT function to handle different date …In this article. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) This function returns a character string representing the specified datepart of the specified date.. See Date and Time Data Types and Functions (Transact-SQL) for an overview of all Transact …SALES table. Most of the examples in the Amazon Redshift documentation use a sample database called TICKIT. This small database consists of seven tables: two fact tables and five dimensions. You can load the TICKIT dataset by following the steps in Step 6: Load sample data from amazon S3 in the Amazon Redshift Getting Started Guide. This …

The Redshift Datepart function provides smart parameters such as “quarter”, “day of week”,” epoch”, etc. which provides direct answers that otherwise require time-consuming manual calculation. With the easy syntax and the list of parameters, you are now equipped to comfortably handle Date and Time data using the Redshift Datepart ...Seconds. AM or PM. Meridian indicator (for 12-hour clock) The default date format is YYYY-MM-DD. The default timestamp without time zone (TIMESTAMP) format is YYYY-MM-DD HH:MI:SS. The default timestamp with time zone (TIMESTAMPTZ) format is YYYY-MM-DD HH:MI:SSOF, where OF is the offset from UTC (for example, -8:00.FORMAT(Date, 'yyyyMM') = 201501 is what I am currently using and need to use DATEPART older versions of SQL Server but cannot see a way of doing it easily. Any help would be very much appreciated. sql; sql-server; sql-server-2008; Share. Follow asked Jun 19, 2015 at 16:06. Simon Price ...AWS's Redshift provides the extract function: EXTRACT ( datepart FROM { TIMESTAMP 'literal' | timestamp } ) The datepart takes various values including epoch - you can therefore extract the epoch...Last updated on Oct 6, 2023. The DATE_PART function allows you to extract a specified date part from a date/time. Like most other SQL functions, you need to pass in arguments; for the DATE_PART function, you’ll pass in a date/timestamp/date field that you want to extract a date part from and specify the part you want removed.

May 12, 2023 · The date_trunc function in redshift is specifically used to truncate the specified precision. For example, if we want to truncate the date and time value to the nearest hour or week, it is possible to truncate using the date_trunc function. The date_trunc function contains the two input parameters, i.e. datepart and timestamp, and the return ... Conclusion. In conclusion, the LPAD and RPAD functions in Redshift are powerful string functions for manipulating character strings in SQL queries. LPAD allows you to pad a string with a specified character on the left, while RPAD does the same on the right. Both functions are useful for formatting data and ensuring consistency in your results.Note Amazon Redshift doesn't validate POSIX-style time zone specifications, so it is possible to set the time zone to an invalid value. For example, the following command doesn't return an error, even though it sets the time zone to an invalid value. set timezone to ‘xxx36’;In this article. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) This function returns a character string representing the specified datepart of the specified date.. See Date and Time Data Types and Functions (Transact-SQL) for an overview of all Transact …

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{"payload":{"allShortcutsEnabled":false,"fileTree":{"doc_source":{"items":[{"name":"AddBBox-function.md","path":"doc_source/AddBBox-function.md","contentType":"file ... Jul 27, 2022 · The Amazon Redshift DATEDIFF function returns the difference between the date parts of two date or time expressions. It is constructed with this syntax: DATEDIFF ( datepart, {date|time|timetz|timestamp}, {date|time|timetz|timestamp} ) The DATEDIFF function is most commonly used in analytic queries for filtering, cohort analyses, and grouping by ... Use the DECIMAL or NUMERIC data type to store values with a user-defined precision. The DECIMAL and NUMERIC keywords are interchangeable. In this document, decimal is the preferred term for this data type. The term numeric is used generically to refer to integer, decimal, and floating-point data types. Storage.Redshift Date Dimension. GitHub Gist: instantly share code, notes, and snippets. Skip to content. All gists Back to GitHub Sign in Sign up ... DATEPART(doy, DATEADD(day, num.number, '2010-01-01')) AS day_of_year, DATEPART(week ...CONCAT function. The CONCAT function concatenates two expressions and returns the resulting expression. To concatenate more than two expressions, use nested CONCAT functions. The concatenation operator ( ||) between two expressions produces the same results as the CONCAT function.

The default column name for the DATEDIFF function is DATE_DIFF. select datediff (qtr, '1998-07-01', current_date); date_diff ----------- 40 (1 row) The following example joins the SALES and LISTING tables to calculate how many days after they were listed any tickets were sold for listings 1000 through 1005. 23-Nov-2020 ... Checking the docs for Amazon Redshift shows this: DATEDIFF ( datepart, {date|time|timetz|timestamp}, {date|time|time|timestamp} ).string1. A CHAR string, a VARCHAR string, or an expression that implicitly evaluates to a CHAR or VARCHAR type.. length. An integer that defines the length of the result of the function. The length of a string is based on the number of characters, not bytes, so that multi-byte characters are counted as single characters.CAST(DATEPART(HOUR,s.Arr) AS VARCHAR) + CAST(DATEPART(MINUTE,s.Arr) AS VARCHAR), The original s.Arr field looks like: 2016-01-04 04:43:00.000 The goal is to make it look like: 0443 But right now my SQL makes it look like: 443 Because it isn't grabbing the leading zeroes.26-Apr-2023 ... Redshift: TO_TIMESTAMP(. (CAST([Subs Schd Dt] AS VARCHAR) || ' ' ||. CAST(DATEPART('hour', [Subs Schd Tm]) AS VARCHAR) || ':' ||. CAST(DATEPART ...This article is about detailed descriptions and examples of the standard Netezza date functions that you can use to manipulate date columns in the Netezza SQL and Netezza stored procedure. In the real word scenarios many application manipulate the date and time data types. Date types are highly formatted and very complicated. Each …datepart. The date part (year, month, day, or hour, for example) that the function operates on. For more information, see Date parts for date or timestamp functions. interval. An integer that specified the interval (number of days, for example) to add to the target expression.SELECT DATE_PART_YEAR (date '20220502 04:05:06.789'); date_part_year --------------- 2022. The following example extracts the year from the CALDATE column. The values in the CALDATE column are dates. For more information about the data used in this example, see Sample database. COPY ... DATETIME AS 'MON-DD-YYYY'. For more information on managing COPY data conversions, see Data conversion parameters . DATEFORMAT and TIMEFORMAT …Learn how to query and manipulate date and time data in SQL Server using datetime and timestamp values. Discover how to retrieve the current date and time, filter records between specific dates or timestamps, extract parts of a timestamp, find the day of the week, and convert timestamps to Unix timestamps for easier comparison and calculation.

datepart. The subfield of a date or time to extract, such as a day, month, year, hour, minute, second, millisecond, or microsecond. For possible values, see Date parts for date or …

Third: that's a very complex view. The best way to build out a complex view is to start with a simple view. Add one source / set of predicates at a time, and look at what changed if/when the create fails.ERROR: Specified types or functions (one per INFO message) not supported on Redshift tables. I tried other flavors as below but all fail. a) Tried with now in single quotes 'now' , create succeeded but failed with another error6. It is not correct as it includes data from 2014-01-01, which isn't a day in 2013. Instead of between, which checks for a closed interval, use >= and < to search for an interval open at the end. SELECT * FROM sales WHERE sales_date >= '2013-01-01' AND sales_date < '2014-01-01'; You could also use year () or datepart () to extract the year ...The argument types supported by the AVG function are SMALLINT, INTEGER, BIGINT, NUMERIC, DECIMAL, REAL, DOUBLE PRECISION, and SUPER. Returns the same data type as expression for any other argument type. The default precision for an AVG function result with a NUMERIC or DECIMAL argument is 38. The scale of the result is the same …SELECT list subquery. The following example contains a subquery in the SELECT list. This subquery is scalar: it returns only one column and one value, which is repeated in the result for each row that is returned from the outer query. The query compares the Q1SALES value that the subquery computes with sales values for two other quarters (2 and ...30-Jun-2023 ... In this case, you would use the DATEDIFF function, which takes three arguments: the date part, the start date, and the end date. Here's a ...10 Answers. Sorted by: 44. Regardless of the actual DATEFIRST setting, the last Sunday could be found like this: SELECT DATEADD (day, -1 - (DATEPART (weekday, GETDATE ()) + @@DATEFIRST - 2) % 7, GETDATE () ) AS LastSunday. Replace GETDATE () with a parameter @date to get the last Sunday before a particular date. Share.亚马逊云科技 Documentation Amazon Redshift Database Developer Guide. Examples. ... The D datepart behaves differently from the day of week (DOW) datepart used for the datetime functions DATE_PART and EXTRACT. DOW is based on integers 0–6, where Sunday is 0. For more information ...

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Function Compatibility with SBCS, DBCS, and MBCS Character Sets. Using Random-Number Functions and CALL Routines. Date and Time Intervals. Pattern Matching Using Perl Regular Expressions (PRX) Using Perl Regular Expressions in the DATA Step. Writing Perl Debug Output to the SAS Log. Perl Artistic License Compliance.datepart. The subfield of a date or time to extract, such as a day, month, year, hour, minute, second, millisecond, or microsecond. For possible values, see Date parts for date or timestamp functions. source. A column or expression that evaluates to a data type of TIMESTAMP, TIMESTAMPTZ, TIME, or TIMETZ.22. On version 2012 or higher you can use the format function to get just year and month, then cast it as an int. On versions prior to 2012 you can do the formatting with the convert function, then cast as int. declare @dateb datetime set @dateb = getdate () select cast (format (@dateb,'yyyyMM') as int) --2012 or higher select cast (convert ...Feb 1, 2018 · DATEDIFF ( datepart , startdate , enddate ) Returns the difference (a signed integer) of the specified time interval between the specified start date and end date. Parameters. datepart: The part of the date that is the time interval of the difference between the start date and end date. The valid values and abbreviations are day (dd, d), hour ... Dec 29, 2022 · datepart: This is a Redshift SQL function that accepts integer arguments. It includes specific parts of the date value like — year, month, day. For further details, refer to Date parts for Date or Timestamp functions. The Redshift Datepart function provides smart parameters such as “quarter”, “day of week”,” epoch”, etc. which provides direct answers that otherwise require time-consuming manual calculation. With the easy syntax and the list of parameters, you are now equipped to comfortably handle Date and Time data using the Redshift Datepart ...The Extract function in Amazon Redshift is a SQL string function that allows you to extract parts of a date or time value such as year, month, day, hour, minute, and second. The benefits of using the Extract function in Amazon Redshift include: Simplify data analysis: The Extract function makes it easy to extract specific parts of a date or ...Redshift Timestamp to Date: datepart = day. This is one of the common use cases: truncating a timestamp to the day. This helps in evaluating the day-to-day trends in your data. Once the truncation to the day value has happened, you can group by the truncated column to evaluate aggregates. Example Query:DATENAME (ms, GETDATE ()) TO_CHAR (NOW (), 'FF3') 777. For more information, see SQL Server to PostgreSQL Migration . In Microsoft SQL Server (MS SQL) you can use DATENAME function to extract the specified unit (a date part such as year, month, day etc.) from a datetime value as string. In PostgreSQL you can use TO_CHAR function with the ...May 12, 2023 · The date_trunc function in redshift is specifically used to truncate the specified precision. For example, if we want to truncate the date and time value to the nearest hour or week, it is possible to truncate using the date_trunc function. The date_trunc function contains the two input parameters, i.e. datepart and timestamp, and the return ... SELECT to_date ('02 Oct 2001', 'DD Mon YYYY'); tells redshift to convert the string '02 Oct 2001' to date. Question 1. DATE_TRUNC('datepart', timestamp) also supports week as datepart - see Date parts for date or timestamp function (Also shown in the example of AWS). You should also be able to provide a date instead of a timestamp. Question 4Expected behavior On using the datediff function on redshift, it should give a normal result. Actual behavior It is throwing a parser exception Token &#39;)&#39; expected : [1:209 ... lukaseder changed the title Date_diff not working for Redshift dialect Add support for Redshift's DATE_DIFF(datepart, date, date) function Jun 3, 2021 ... ….

datepart. Un literal o cadena de identificación de la parte específica del valor de la fecha (por ejemplo, año, mes o día) en la que actúa la función. Para obtener más información, consulte Partes de fecha para funciones de fecha o marca temporal. {date|timestamp} Una columna de fecha, una columna de marca de tiempo o una expresión que ...FORMAT(Date, 'yyyyMM') = 201501 is what I am currently using and need to use DATEPART older versions of SQL Server but cannot see a way of doing it easily. Any help would be very much appreciated. sql; sql-server; sql-server-2008; Share. Follow asked Jun 19, 2015 at 16:06. Simon Price ...This is the documentation for the Amazon Redshift Developer Guide - amazon-redshift-developer-guide/r_Dateparts_for_datetime_functions.md at master · awsdocs/amazon ... Jul 22, 2023 · 1.DATE ()関数 - 日付部分の抽出 時刻情報を除いて、年月日の部分だけを取得したい場合に便利です。. SELECT DATE ('2023-07-22 15:30:45'); -- 結果: 2023-07-22 2.GETDATE ()関数 / CURRENT_DATE - 現在時刻 これは、現在の日時を取得するのに使います。. 日付と時刻の両方が必要な ... Calculate % of total - redshift / sql. I'm trying to calculate the percentage of one column over a secondary total column. create temporary table screenings_count_2018 as select guid, datepart (y, screening_screen_date) as year, sum (case when screening_package = 4 then 1 end) as count_package_4, sum (case when screening_package = 3 then 1 end ...Jul 27, 2022 · The Amazon Redshift DATEDIFF function returns the difference between the date parts of two date or time expressions. It is constructed with this syntax: DATEDIFF ( datepart, {date|time|timetz|timestamp}, {date|time|timetz|timestamp} ) The DATEDIFF function is most commonly used in analytic queries for filtering, cohort analyses, and grouping by ... 1.DATE ()関数 - 日付部分の抽出 時刻情報を除いて、年月日の部分だけを取得したい場合に便利です。. SELECT DATE ('2023-07-22 15:30:45'); -- 結果: 2023-07-22 2.GETDATE ()関数 / CURRENT_DATE - 現在時刻 これは、現在の日時を取得するのに使います。. 日付と時刻の両方が必要な ...The date_trunc () function will truncate a timestamp to any number of levels including “week”. If memory serves a date_trunc to a week will set the result to midnight of the Monday before the given timestamp. Now you want it to truncate to Saturday, 2 days earlier, and this is doable by adding 2 days before the date_trunc and then ...position. Position of the portion of string to return (counting from 1). Must be an integer greater than 0. If position is larger than the number of string portions, SPLIT_PART returns an empty string. If delimiter is not found in string, then the returned value contains the contents of the specified part, which might be the entire string or an ...Jul 27, 2022 · The Amazon Redshift DATEDIFF function returns the difference between the date parts of two date or time expressions. It is constructed with this syntax: DATEDIFF ( datepart, {date|time|timetz|timestamp}, {date|time|timetz|timestamp} ) The DATEDIFF function is most commonly used in analytic queries for filtering, cohort analyses, and grouping by ... Datepart redshift, Function Compatibility with SBCS, DBCS, and MBCS Character Sets. Using Random-Number Functions and CALL Routines. Date and Time Intervals. Pattern Matching Using Perl Regular Expressions (PRX) Using Perl Regular Expressions in the DATA Step. Writing Perl Debug Output to the SAS Log. Perl Artistic License Compliance. , SAS/Access to JDBC in 9.4 was introduced in Nov 2018 release and yes don't see much examples for it connecting to AWS Redshift as SAS also offers a native SAS/Access to Redshift engine. As per the system requirements documentation for JDBC you would need a driver that comply with the JDBC 4.1 specification or later. It should support below ..., Oct 1, 2020 · base_table. month year 5 2021 10 2020 I want to combine the "month" and "year" column into a proper date column. month_year 2021-05-01 2020-10-01 , Usage Notes¶. date_or_time_part must be one of the values listed in Supported Date and Time Parts.. When date_or_time_part is week (or any of its variations), the output is controlled by the WEEK_START session parameter. For more details, including examples, see Calendar Weeks and Weekdays. date_or_time_expr can be a date, time, or timestamp., datepart. An identifier literal or string of the specific part of the date value (for example, year, month, or day) that the function operates on. For more information, see Date parts for date or timestamp functions. {date|timestamp} , datepart The subfield of a date or time to extract, such as a day, month, year, hour, minute, second, millisecond, or microsecond. functions. source A column or expression that evaluates to a data type of TIMESTAMP, TIMESTAMPTZ, TIME, or TIMETZ. Return type INTEGER if the sourcevalue evaluates to data type TIMESTAMP, TIME, or TIMETZ., Rather than converting dates to the human-readable YYYYMMDD format, it is always better to keep them as DATE or TIMESTAMP format. This way, date operations can be easily performed (eg adding 5 days to a date)., 1. trunc (created_at_date) between '2014-06-01' and '2014-06-30'; Definitely not this one for obvious reasons (like) 2. created_at_date like '2014-06%'. May be this one: 3. created_at_date >= '2014-06-01 00:00:00' and created_at_date <= '2014-06-30 23:59:59'. However, since the requirement is to generate monthly reports which I would assume to ..., Jun 1, 2017 · In order to go from an epoch to a date you can use the following SQL: select timestamp 'epoch' + 1496275200 * interval '1 second' -- Result: 2017-06-01 00:00:00. Initially this is super opaque so let’s break it down. When we do select timestamp 'epoch' by itself we get 1970-01-01 00:00:00 which is special because it is the time when we ... , The DATEPART(isowk) doesn’t offer a clue as to which year, quarter, or month the week is a part of. It doesn’t come close to the ISO standard in that area., Problem. Microsoft SQL Server 2008 and earlier versions used the CONVERT functions to handle date formatting in SQL queries, SELECT statements, stored procedures and T-SQL scripts.In this tip, Date and Time Conversions Using SQL Server, we have a list of the available examples on how to use the CONVERT function to handle different date …, Seconds. AM or PM. Meridian indicator (for 12-hour clock) The default date format is YYYY-MM-DD. The default timestamp without time zone (TIMESTAMP) format is YYYY-MM-DD HH:MI:SS. The default timestamp with time zone (TIMESTAMPTZ) format is YYYY-MM-DD HH:MI:SSOF, where OF is the offset from UTC (for example, -8:00. , Amazon Redshift Database Developer Guide Datetime format strings PDF RSS You can find a reference for datetime format strings following. The following format strings apply to functions such as TO_CHAR. These strings can contain datetime separators (such as ' - ', ' / ', or ': ') and the following "dateparts" and "timeparts". Note, Then you can query it. select fn_month_name_to_number ('February') as month_no. This query will return 2 as month number. You can pass values from a column as parameters to the function. select fn_month_name_to_number (*columnname*) as month_no from *tablename*. Have a good day!, DATEPART function is used to return a part of a given date in a numeric value. The part can be the day of the date, month of the date, year of the date etc. For example, we can use the DATEPART function to get the day of a given date to determine whether an order was placed on Sunday or not. Another example is to get the month of a …, I am using PostreSQl server and have to get data grouped by date part of timestamp (ie. group by month or year or week) so I am using the Extract(year from timestamp) function but I saw in the Post..., Amazon Redshift · Amazon S3 · Apache Hive · Apache Impala · API · Global Settings · Tables ... DATEPART(datepart, date [,integer_datefirst]); DATETIME2FROMPARTS ..., Nov 21, 2017 · 1. You have too many inline subqueries. Try using common table expressions ( CTE) to decompose the logic in a way that Redshift can run efficiently. Most of your inline subqueries can be rewritten as an aggregate over a Cartesian product. WITH cte1 AS ( SELECT i1.CONNECT_DATE CONNECT_DATE ,i1.DAILY_CONNECTIONS DAILY_CONNECTIONS -- Sub-selects ... , datepart. 関数が実行される日付の値の特定部分 (例: 年、月、または日) の識別子リテラルまたは文字列。詳細については、「日付関数またはタイムスタンプ関数の日付部分」を参照してください。 {date|timestamp}日付列、タイムスタンプ列、または暗黙的に日付またはタイムスタンプに変換される式。, {"payload":{"allShortcutsEnabled":false,"fileTree":{"doc_source":{"items":[{"name":"AddBBox-function.md","path":"doc_source/AddBBox-function.md","contentType":"file ..., Jan 4, 2016 · ERROR: Specified types or functions (one per INFO message) not supported on Redshift tables. I tried other flavors as below but all fail. a) Tried with now in single quotes 'now' , create succeeded but failed with another error , Datepart(datepart, date) takes the datepart and date i.e. 2 parameters. Datepart is a part of date, e.g. day, month, year. GETDATE() Returns the current database system timestamp as a datetime value. This value is derived from the operating system of the computer on which the instance of SQL Server is running., Jun 1, 2014 · 1. trunc (created_at_date) between '2014-06-01' and '2014-06-30'; Definitely not this one for obvious reasons (like) 2. created_at_date like '2014-06%'. May be this one: 3. created_at_date >= '2014-06-01 00:00:00' and created_at_date <= '2014-06-30 23:59:59'. However, since the requirement is to generate monthly reports which I would assume to ... , PERCENT_RANK window function. Calculates the percent rank of a given row. The percent rank is determined using this formula: where x is the rank of the current row. The following dataset illustrates use of this formula: The return value range is 0 to 1, inclusive. The first row in any set has a PERCENT_RANK of 0., What a quick way to extract the full month name from a date in redshift. 2022-01-01 -&gt;&gt; January, datepart. Bagian tanggal untuk memotong nilai stempel waktu. Masukanstempel waktuterpotong dengan presisi inputdatepart. Sebagai contoh,monthterpotong ke hari pertama bulan itu. Format yang valid adalah sebagai berikut:, 2. You could use a padding trick with RIGHT here: SELECT RIGHT ('0' + CAST (DATEPART (month, prod_date) AS nvarvhar (10)), 2) FROM myTbl; The idea is to prepend a 0 to every month number string, and then retain only the right two digits, which would be either a two digit month already, or a single digit with a zero in front of it. Share., In this example, we used the DATEPART() function to extract year, quarter, month, and day from the values in the shipped_date column. In the GROUP BY clause, we aggregated the gross sales ( quantity * list_price) by these date parts.. Note that you can use the DATEPART() function in the SELECT, WHERE, HAVING, GROUP BY, and ORDER BY …, datepart: The part of the date that is the time interval of the difference between the start date and end date. The valid values and abbreviations are day (dd, d), hour (hh), minute (mi, n), second (ss, s), and millisecond (ms)., There's also the date_trunc function which will truncate everything after a given datepart. This is a little clunky, and will only set you back to the previous Monday, not Sunday. select date_trunc('week', my_date) from (select date('2018-02-14') as my_date), Week and weekday datepart arguments. For a week (wk, ww) or weekday (dw) datepart, the DATEPART return value depends on the value set by SET DATEFIRST.. January 1 of any year defines the starting number for the week datepart.For example: DATEPART (wk, 'Jan 1, xxxx') = 1where xxxx is any year.. This table shows the return …, Week and weekday datepart arguments. For a week (wk, ww) or weekday (dw) datepart, the DATEPART return value depends on the value set by SET DATEFIRST.. January 1 of any year defines the starting number for the week datepart.For example: DATEPART (wk, 'Jan 1, xxxx') = 1where xxxx is any year.. This table shows the return …, 4 days ago ... Extracts a part of the date, timestamp, or interval. In this article: Syntax; Arguments; Returns; Examples; Related functions. Syntax.