For example, the number of minutes between two datetime values evaluates the date component as well as the time component, and adds 1440 minutes for each day difference. 0. Delaying Execution. 0. DateValue > DateAdd (day,-3,getdate ()) doing this in this way makes your. LogDesc, Feeds. Date Difference between consecutive rows. If you want the value as an exact figure (or nearabouts), you should datediff the dates on days, then divide by 30. Actually, the marked answer originally produced wrong results for milliseconds 1 - 99: Example 1 second, 27 milliseconds: DATEDIFF % 1000 will return 27. Timediff in MySQL wrong values. In this article, Let us see a Spark SQL Dataframe example of how to calculate a Datediff between two dates in seconds, minutes, hours, days, and months using Scala language and functions like datediff(), unix_timestamp(), to_timestamp(),. MySQL calculation minute using TIMEDIFF() 5. Result: '1. The difference between startdate and enddate is expressed in days. Edit the SQL Statement, and click "Run SQL" to see the result. Learn more about TeamsPySpark Timestamp Difference – Date & Time in String Format. Date Interval Calculation: The number of specified date parts between two provided dates is found using the DATEDIFF () method. SQL Server and most of the RDBMS do not allow to reference column at the same level. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. Definition, syntax, examples and common errors using BigQuery Standard SQL. format_datetime(timestamp, format) → varchar. The time value can represent elapsed time as well. To get the DATE difference you have only to calculate test_time-SYSDATE This difference of two DATE values gives the number of days. SQL Server. One of the most commonly used functions is the DATEDIFF function. g. So I would return 0. If you are using Sql Server 2012+ then use. How to calculate DateDiff in minutes correctly?Im using this: update client_invoices set x6 = datediff(x4, date_due) as an event in mysql but everytime they updates the server the "Event scheduler status" is turned off. This function was run on. 0 The documentation for DATEDIFF is available on MSDN: pyspark. The way it works is, you provide the two values to compare, and. timediff() 以下のような結果なので使えそうだけど、結果から「60 より大きい」を取得するには更に変換が必要そうHi All, I have two date Suppose one is getdate() and other one is gatedate() +1 . The minus sign (-) can also be used to subtract dates. ), the start date or time that specifies the beginning of the period. To compare dates in SQL, the most common functions used are DATEDIFF, DATE_ADD, DATE_SUB, and NOW. prepareCall ("select TIMEDIFF ('2013-12-09 06:22:01','2013-08-07 05:22:01') as time_used from dual"). The following illustrates the syntax of the DATEPART. SQL 教學. selectExpr (" (unix_timestamp (ts1) - unix_timestamp (ts2))/3600") This first converts the data in the columns to a unix timestamp in seconds, subtracts them and then converts the difference to hours. t2 on t1. -- Select [dbo]. TIME_TO_SEC (TIMEDIFF (endDate, startDate))/3600 as hours. The addition of these functions help with readability and simplicity. Two date functions included in MySQL are DATEDIFF () and TIMEDIFF (). Let us use the MySQL TIMEDIFF() function to find the values of the following – Time difference between 622:45:22 and 15:10:33 and, Time difference between. These functions assist in comparing, adding, subtracting, and getting the current date and time, respectively. LogInOn – The column name which is to be subtracted. 1. sql timediff function. YourTable ) SELECT c1. Improve this question. if you are on sql server 2008, there is the DATE date time which has only the date part, not the time: select cast (GETDATE() as DATE) --2012-05-01 Share. 677', '2021-02-17 20:52:51. Syntax: DATEDIFF (day or dy or y, <start_date>, <end_date>);The DATEDIFF function in SQL Server is used to calculate the difference between two dates. MySQL calculation minute using TIMEDIFF() 0. 0 indicates weak or no similarity between the SOUNDEX values. The DIFFERENCE () function compares two SOUNDEX values, and returns an integer. From second to datetime sql server. both YEAR and YEARS are valid). To get the difference in hours, choose hour. If such precision is required, and if the difference between the two dates may be outside of the TIME range, then splitting each of your DATETIME columns into two DATE and TIME columns would certainly perform. You can put the above code in a method that you can call from your LINQ query. If you want to your query to return three (one for each actual date involved), either JOIN to a calendar table, add one to the result automatically, or do the datediff in hours, divide by 24. The datepart argument can be microsecond, second, minute, hour, day, week, month, quarter, or year. The following illustrates the syntax of the DATEDIFF() function in SQL Server: DATEDIFF ( datepart , startdate , enddate ) Code language: SQL (Structured Query Language) (sql) Arguments datepart. Improve this answer. DATEDIFF(hour, start_date, end_date) will give you the number of hour boundaries crossed between start_date and end_date. startdate: The first date or datetime value. MySQLだけでDateTime - DateTimeなどの時間差分を取りたい…やり方を知らないとカラムA／Bの時間を別々に取得し、それをスクリプト側で計算みたいな遠回りをしがちです。ところがMySQLにはTIMEDIFF()という便利な関数が用意されてます。この関数が本当に便利なので、知らない人の為にTIMEDIFF()をまとめ. We will use the below date for the examples. sql. How to calculate age in SQL view. Pair ORDER BY T. You'll get a more accurate result if you compute the difference between the two dates in days and divide by the mean length of a calendar year in days over a 400 year span (365. Another example is to get the month of a. : you're comparing dates with timestamps, and not whole days), you can. You get the difference in days. SyntaxI tried with DATEDIFF but I am never able to get a true values especially for the case from 18:30 to 6:00 I tried like this, but does not work for this case(8:30 to 6:00). (timestamp) function. Specifically, it gets the difference between 2 dates with the results returned in date units specified as years, months days, minutes, seconds as a bigint value. Where a. Calculate working hours using DATEDIFF in SQL Server. 6 Answers. #1752702. DateDiff in SQL. numeric-expression. basically it will compare the row below it for all records. mySql TimeDiff between TimeStamp in Rows of a Single Table. Below would correct the most popular answer to return hours as an integer and minutes as a decimal (ie 6. Use UNIX_TIMESTAMP instead to do the sum. sql. In the end, you typically see these calculations done with code. Returns the difference between two timestamps measured in unit s. If you really want 'datediff' in your database, you can just do something like this: Now, i just create a view to demonstrate with: SQL> select datediff ( 'ss', d1, d2 ) seconds from temp_view; SECONDS6269539. TIMESTAMPDIFF ( numeric-expression string-expression. 3 = Tuesday. Time, S. 8494441'. Current Date/Time. According to DB2's manual, DAYS () returns: "The result is 1 more than the number of days from January 1, 0001". If you need the difference in seconds (i. All of this is well documented in MySQL Date and Time functions. 2 Answers. Also, you can swap out the 'd' character for other dateparts, say if you wanted to find the date difference in months, years etc. You'd like to calculate the difference between arrival and departure and the number of days from arrival to departure inclusively. Bid DESC ) AS T ) SELECT Pair, AVG(DIFF) FROM. 4 and above. MySQL TIMEDIFF () Function. The MYSQL TIMEDIFF() function accepts two time or, date-time values as parameters, calculates the difference between them (argument1-argument2) and returns the result. Both arguments should be of the same type. DECLARE @NumberOfSeconds int SET @NumberOfSeconds = 3843 -- 1 hour, 4 minutes, 3 seconds SELECT @NumberOfSeconds AS 'seconds', CONVERT (varchar, DATEADD (second,. To convert “Datetime” values to Epoch values, we need to add them to the created table. I'm trying to calculate the difference of hours between two TIME variables. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. DECLARE @then datetime={ts '2014-01-23 12:34:56. The difference is measured in the time unit specified by datepart. SELECT DATEDIFF (MINUTE, '2014-03-18 07:00:00. Only the date parts of the values are used in. Note that unit values can be different in SQL Server DATEDIFF and MySQL TIMESTAMPDIFF. In this article. The parameter can have two values: 0: The affected week-related functions use semantics similar to the ISO semantics, in which a week belongs to a given year if at least 4 days of that week are in that year. 0. SubmittedDate = 2012-02-29 07:02:55. g. First, create and populate sample table (Please save us this step in your future questions):CREATE TABLE face_login_logout (. Subtracts the 2nd argument from the 1st (date1 − date2). 1 Answer. int See moreI would expect select CONVERT (varchar (12), DATEADD (SECOND, DATEDIFF (SECOND, '2021-02-16 18:41:31. For formatting functions, refer to Section 9. To get the difference in hours, choose. DATEDIFF uses the datepart argument to calculate the number of intervals between two dates, rather than the actual amount of time between them. Edit the SQL Statement, and click "Run SQL" to see the result. The datepart argument can be microsecond, second, minute, hour, day, week, month, quarter, or year. (ORDER BY [seat number])rr FROM #test) SELECT c1. The next example will show the differences between two dates for each specific datapart and abbreviation. Use DATEADD (): where HireDate < dateadd (year, -3, GETDATE ()) DATEDIFF () does not do what you think it does. Applies to: Databricks SQL Databricks Runtime 14. Instead, use the dateAdd function on todays date, and compare the database table column to the result of that single calculation. enddate: The ending datetime value. timediff between rows. You can't display more than 24 hours in a time format 00:00, so you need to choose a different way to display the output. Mangu. DATEDIFF Examples Using All Options. SQL elapsed-time calculations for DATE, DATETIME, and TIMESTAMP data types are done with DATEDIFF function, with the following syntax: Any valid date or date. 1. g. ) So, we can call DateDiff(second, Date1,Date2) and easily get the total number of seconds between. 9. 2 Answers. 1. Each day is 1 integer. Instead, the result is 838:59:59, which makes sense because that is the limit. Second parameter would be the last login time, which is already in the database. Syntax TIMEDIFF( <date_or_time_part> , <date_or_time_expr1> , <date_or time_expr2> ) Arguments date_or_time_part The unit of time. Timestamp = DATEDIFF (MINUTE, Feeds. Query to Find the date difference between 2 rows of a single column. 1 Answer. Something like: SELECT DATEDIFF (d, StartDate, EndDate) FROM tableName. 0. Definition and Usage. The second parameter of DATEDIFF takes a datetime so your string is implicitly converted to a datetime. timediff() from mysql select. Plus, maybe the datediff sequence might need swapping the datetime values as you may be producing negative values, but this is data dependent so I am not certain on this latter point. endDate: A DATE expression. SELECT DATEDIFF (day, '2019-12-05 08:09:55', GETDATE ()); Result: 39. Your best bet is to calculate the difference in seconds, and use a function to format the result. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. 3. DATEDIFF : DATEDIFF_BIG : This is a very old function and it is available from the initial release SQL Server. round ( 48 * ( cast (ActualEnd as float)-cast (ActualStart as float) ),0) /2. Bid, ABS(S. I need to get scenario value when timediff(c2,c3) > 30 MIN SELECT scenario, rowcreatedctime,eventtime FROM `chat_assist_session_request` LIMIT 1 scenario rowcreatedtime eventtime scen1 2014-09-02 09:00:00 2014-09-02 09:45:00 scen2 2014-09-02 10:00:00 2014-09-02 10:13:00 I would like to query a database using sql to show the difference in time between id 1,2,3 and so on. Edit the SQL Statement, and click "Run SQL" to see the result. The following shows the syntax of the DATEPART() function:. Firebird - Calculate time difference between two rows. The results are limited to TIME values ranging from - 838:59:59 to 838:59:59. We have the above table Employee which consists of the date of birth and from this, we will calculate the age in. 5. 000', @EndTime datetime = '2016-05-10 03:31:00. functions. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. If you want hour to be very specific, you can use as given below: Declare @Start DateTime = '1/1/17 7:59 AM' Declare @End Datetime = '1/1/17 8:00 AM' select DATEDIFF (MINUTE, @Start, @end) /60 AS Hour. Id > S. Syntax TIMEDIFF( <date_or_time_part> , <date_or_time_expr1> , <date_or time_expr2> ) Arguments date_or_time_part The unit of time. Learn its intricacies and enhance your database tasks efficiently. Use DATEADD (): where HireDate < dateadd (year, -3, GETDATE ()) DATEDIFF () does not do what you think it does. 27' which means 270ms rather than 27ms. SQL DateDiff in Minutes Spanning Over Night. Mangu. I would expect select CONVERT (varchar (12), DATEADD (SECOND, DATEDIFF (SECOND, '2021-02-16 18:41:31. Java Date Functions. This function is a synonym for timestampdiff function. Topic link icon Transact-SQL Syntax Conventions Syntax. It is better to keep dates as dates (e. This function is a synonym for timestampdiff function. Datediff SQL is key for developers, enabling accurate date calculations. Also, you can swap out the 'd' character for other dateparts, say if you wanted to find the date difference in months, years etc. 0. Run SQL ». Here expr2 is greater than expr1, so the return value is positive. Possible Duplicate: MySQL convert timediff output to day, hour, minute, second format. parse_datetime(string, format) → timestamp with time zone. DECLARE @NumberOfSeconds int SET @NumberOfSeconds = 3843 -- 1 hour, 4 minutes, 3 seconds SELECT @NumberOfSeconds AS 'seconds', CONVERT (varchar, DATEADD (second,. In a Unicode database, if a supplied argument is a. Is there any way around this so the result of the query can go. It can be used to do date math as well. 2. For example, here's how you would do that in SQL Server 2012 or later: --get the difference between two datetimes in the format: 'hh:mm:ss' CREATE FUNCTION getDateDiff (@startDate DATETIME, @endDate DATETIME) RETURNS. expr1 and expr2 are time or date-and-time expressions, but both must be of the same type. In case you use a DATE value, the TIMESTAMPDIFF function treats it as a DATETIME value whose time part is. Use the DateDiff function in VBA code. Previous SQL Server Functions Next . 更多 MySQL 相關的日期時間函數在這邊. If the endDate has a day part less than startDate, it will get pushed to the previous month, thus datediff will give the correct number of months. The T-SQL DATEDIFF is defined as a primary function in T-SQL that can be used to find the difference between two date-utilities in which it has been utilized to differentiate between two date values having various date parts. 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. Discussion: To calculate the difference between the timestamps in MySQL, use the TIMESTAMPDIFF (unit, start, end) function. Complete command we have used to display record is like. . SQL Server does not. answered Aug 1, 2014 at 6:27. The only function I know is Datediff which only works in Legacy SQL but I'm in Standard SQL. Return the current time. This function takes three arguments: the start date, the end date, and the unit of time you want to measure. 25 then it will return number of years in decimal places. 0. SELECT DATEADD (month, 1, '20220730'); The below DATEADD will add 1 year to the provided date value, the year changed from 2022 to 2023. This function returns an integer representing the difference between date1 and date2 with the unit specified by the interval. its a countdown with the current date. Note: TIMEDIFF () requires two arguments for comparison, and TIMEDIFF () subtracts the second argument from the first, then returns the result as the time value. learn sql tutorial. *,DATEDIFF(mi,c2. datepart DATEDIFF で startdate と enddate の違いを報告する場合の単位。 一般的に使用される datepart の単位には、month または second が含まれます。. If you need the number of fractional hours, you can use DATEDIFF at a higher resolution and divide the result: DATEDIFF(second, start_date, end_date) / 3600. 1. To get time difference between datetime or smalldatetime columns you can use DATEDIFF function. Example of the possible combinations below: Interval. Here is the sample code and sample. Datediff () will also allow you to take month, hour, or other time measures. count week days in sql by datediff. I don't think this is really important to your question. The function returns the result of subtracting the second argument from the third argument. 0. That prevents SQL Server from using. The TIMEDIFF function returns the result of expr1 - expr2 expressed as a time value, with a return value of TIME type. TIME TIMEDIFF (DATETIME expr1, DATETIME expr2) TIMEDIFF returns the difference between two DATETIMEs. If the returned result is out of range for 32-bit. MySQL の TIMEDIFF () は日時や時間型の値を二つ、入力引数として受け取り、その差分の時間を返す日付関数です。. 2. g. Follow edited May 15, 2018 at 17:24. datediff(yy,'31 Dec 2013','1 Jan 2014') returns 1. SELECT DISTINCT LEAST (180, DAYS_BETWEEN (current_date, start_date)) as days FROM table2 where expire_date > current_date. Edit the SQL Statement, and click "Run SQL" to see the result. any help would be appreciated. In SQL Server: Like we do in SQL Server its much easier. Date Part Flexibility: Years, months, days, hours, minutes, and seconds are among the date parts that are supported. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. Get date difference. Select idcode, datetime, Difference = datediff (millisecond,. MySQL timediff on one column for selected records in table. The DATEPART () function returns an integer value that represents a specified part of the date of a given date. SELECT id, timeIn, timeOut, TIMEDIFF ( timeOut, timeIn ) AS timeDifference FROM table WHERE TIMESTAMPDIFF ( SECOND, timeOut, timeIn ) > 180000; This statement will output the fields for each record where the difference between the two timedates is one second or more over 50 hours (or 180000 seconds ). In MySQL, the TIMEDIFF () function is used to return the difference between two time or DateTime components. Applies to: Databricks SQL Databricks Runtime 10. Sintaxis. If the value is not a CHAR or VARCHAR data type, it is implicitly cast to VARCHAR before evaluating the function. SELECT *, ISNULL(DATEDIFF(mi, LAG(CreateDate,1) OVER (ORDER BY ID), CreateDate), 0) AS Duration. I have the following conditional statement in my SQL query: WHERE TIMEDIFF("03:00:00", VARIABLE) >= "00:05:00" The above works as expected. In lack of something better to use for a date SQL Server uses 1900-01-01 so your second parameter ends up to be 1900-01-01 15:19:53. 4. userid AND c1. To calculate the difference between the arrival and the departure in T-SQL, use the DATEDIFF (datepart, startdate, enddate) function. All you need is to execute the code below and then use the function. You will just need to enter DATEDIFF (day,CreatedDateTime,GETDATE ()), or a similar query. timediff. datediff with conditions in select statment. The TO_DAYS () function can be used only with dates within the Gregorian calendar. The DATETIME system is newer (but still old — circa 1990). For example: the difference between 20180115 to 20180220 is 36 days. select recordid, transdate, cast ( (transdate - lag (transdate) over (order by transdate)) as time) as diff from t; In other words, you can subtract two datetime values and cast the result as a time. 9. MySQL timediff — is it a bug? 0. To do so, we can utilize the timestampdiff () function provided by DB2. As such, it is limited to the data type TIME. This function was run on 14 Jan which gives the result of 39. Column [source] ¶ Returns the number. Spudley. Instead, use the dateAdd function on todays date, and compare the database table column to the result of that single calculation. g. LogOutOn – The column name from which second parameter to subtract. Like the two fields are sale_start_date. SQL Server DATEDIFF() 函数 SQL Server Date 函数 定义和用法 DATEDIFF() 函数返回两个日期之间的天数。 语法 DATEDIFF(datepart,startdate,enddate) startdate 和 enddate 参数是合法的日期表达式。datepart 参数可以是下列的值： datepart 缩写 年 yy, yyyy 季度 qq, q . 0. 2. If you want to do it pure SQL here's one approach. 12:25 occurred with 12 minutes and 25 seconds left, etc. For neatness, I've also rounded to a single decimal place. If the value returned from TIMEDIFF() is greater than 5 minutes, the record it represents will be returned. Timestamp difference in PySpark can be calculated by using 1) unix_timestamp () to get the Time in seconds and subtract with other time to get the seconds 2) Cast TimestampType column to LongType and subtract two long values to get the difference in seconds, divide it by 60 to. The TIMESTAMPDIFF function returns an estimated number of intervals of the type that is defined by the first argument, based on the difference between two timestamps. MySQL timediff function does not give proper output. g. datediff. DateTime startDate =. Factor by 24 to get hours, 24*60 to get minutes, 24*60*60 to get seconds (that's as small as dates go). The following is a view of the Claims structure. expr1 and expr2 are date or date-and-time expressions. DATE_ADD () Add time values (intervals) to a date value. Subtracting one from the other gives the number of days between the two datetimes. Must be one of the values listed in. For example, only seconds, or only minutes or only hours. DateDiff to show Minutes and Seconds. ) and rest are two dates which you want to compare. In this article: Syntax. Improve this answer. (timestamp) function. ADDTIME(), TIMEDIFF() SQL Time Functions in MySQL- Example Sample output 5 . You obtain this record using the LAG () window function. SQL DATEPART. The first parameter is a numeric value indicating the unit in which you wish to receive the results in; the values must be one of the following. Covering popular subjects like HTML, CSS, JavaScript,. Problem: You have two columns of the date type and you want to calculate the difference between them. IDATEDIFF関数は、引数で指定された2つの日付間の差を求める関数です。第2引数から第3引数を引きます。このとき第1引数で指定した要素（年、月、日など）に付いて引き算が行われ、その差分が整数の値で返ってきます。いちれべ. If the records have sequential id's you could do a self join like this: SELECT t2. This function calculates the number of date parts between two specified dates. MS Sql Datediff Function. @Bruno - If the data types are TIMESTAMP WITH TIME ZONE, the interval that results from subtracting the two should take care of any time zone/ daylight savings time conversion. Q&A for work. Applies to: Databricks SQL Databricks Runtime 14. AT TIME ZONE. sql; google-bigquery; datediff; date-difference; Share. You can observe the output that we have added 10 seconds, 10 minutes, and 10 hours in the current time of the system. Bid - T. forexData AS S CROSS APPLY ( SELECT TOP (1) T. The math is 100% accurate for dates within a couple of hundred years or so. SQL Server DATEDIFF() 函数 SQL Server Date 函数 定义和用法 DATEDIFF() 函数返回两个日期之间的天数。 语法 DATEDIFF(datepart,startdate,enddate) startdate 和 enddate 参数是合法的日期表达式。datepart 参数可以是下列的值： datepart 缩写 年 yy, yyyy 季度 qq, q 月 mm, . example, if start_date and end_date differed by 59 seconds, then DATEDIFF (MINUTE,. SQL> select oldest - creation from my_table; If your date is stored as character data, you have to convert it to a date type first. Number of weekdays between two dates - StartDate question. CreatedDate) as Difference from Registration a1 inner join Registration a2 on. I used your SQL Fiddle and posted a working solution here. 0. To count the difference between dates in MySQL, use the DATEDIFF (enddate, startdate) function. Multiply by 24 -- hours, multiply by 60 minutes, multiply by 60 -- seconds. Here’s the syntax of TIMEDIFF() function: TIMEDIFF(time1, time2); Code language: SQL (Structured Query Language) (sql) In this syntax: time1: The first TIME or DATETIME value. TIMEDIFF(date1, date2) Arguments. The DATEDIFF function accepts three parameters, interval, date1, and date2. So, we can use the TIMEDIFF() function with time values greater. Note that SQL Server DATEDIFF function returned 1 year although there are only 3 months between dates. 0 and above. Syntax DATEDIFF(datepart, start_date, end_date) Syntax. We need to create a table that has at least one column with a specified DATETIME datatype. 25; You might want to truncate result of above query to two decimal places. Connect and share knowledge within a single location that is structured and easy to search. 1 year and 2 months. Follow. Getting Hour and minute in from DATEDIFF in decmial format, SQL. – The syntax for DATEDIFF is pretty straightforward: DATEDIFF (datepart, startdate, enddate) Let’s explore the parameters used here: datepart: The unit of time you want to use for the calculation, like year, quarter, month, day, or even smaller units like hour, minute, or second. This code snippet shows how to calculate time differences. SELECT DATEDIFF (YY,'01/02/2011 15:00:00','01/01/2016 14:00:00') 5. This means. An expression that returns a value that is a built-in SMALLINT or. October 10, 2023. select datediff ('2019-02-01', '2019-01-27')/365. You'd probably need to tweak this to handle the. Note: time1 and time2 should be in the same format, and the calculation is time1 - time2. select ID, emp_name, emp_dateOfBirth from Employee. DATE_FORMAT () Format date as specified. x) and later Azure SQL Database Azure SQL Managed Instance This function returns the count (as a signed big integer value) of the specified datepart boundaries crossed between the specified startdate and enddate. 2. Returns. DateGroup. Timestamp, CURRENT_TIMESTAMP) FROM Feeds INNER JOIN Users ON Feeds. If you need the difference in seconds (i. to get the date one second before midnight of. startdate: The starting datetime value. This example uses the current date to find the difference between the current date and a specific date. You get the difference in days. createdon) [date diff in min] FROM cte c1 JOIN cte. Definition and Usage. SQL Server does not. SELECT DATEDIFF (YY,'01/02/2011 15:00:00','01/01/2016 14:00:00') 5. 5 hours). 3. Invalid function type [TIMEDIFF] for window function. For example, you can use: SELECT TIMESTAMPDIFF (SECOND, '2012-06-06 13:13:55', '2012-06-06 15:20:18') In your case, the third parameter of TIMSTAMPDIFF function would be the current login time ( NOW () ). It is the unit in which the DATEDIFF () function returns the difference between a start date and an end date e. userid , SUM(DATEDIFF(s, c1. Run SQL ». order_logs_created, DATEDIFF (HOUR ,NOW (),order_logs.