5 = Thursday. Mysql TIMEDIFF NULL values. 8494441'. Use DATEADD (): where HireDate < dateadd (year, -3, GETDATE ()) DATEDIFF () does not do what you think it does. If you are using MySQL there is the DATEDIFF function which calculate the days between two dates: SELECT dtCreated , bActive , dtLastPaymentAttempt , dtLastUpdated , dtLastVisit , DATEDIFF (dtLastUpdated, dtCreated) as Difference FROM Customers WHERE (bActive = 'true') AND (dtLastUpdated > CONVERT (DATETIME,. Calculates the difference in week numbers and year numbers, subtracts the week numbers and then multiplies the result by 2 to calculate number of non-workdays between the two dates. 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. select datediff (dd,convert (date,date2),convert (date,date1)) From Yourtable. Find the interval between today's date and a column. This function is a synonym for timestampdiff function. Both arguments of this function must be of same type (either time or date-time) . function. The DATEDIFF function results are truncated, not rounded, when the result is not an even multiple of the date part. Here, you'd like to get the difference in seconds, so choose second. Elegant, simple and effective. Hope it helps. Output of tip #1 — Code and screenshot by author. See also: TIMEDIFF, TIMESTAMPDIFF Use this function to calculate the number of business days excluding Saturday and Sunday. Difference in minutes from two time fields in MySQL. expr1 and expr2 are time or date-and-time expressions, but both must be of the same type. I have the following conditional statement in my SQL query: WHERE TIMEDIFF("03:00:00", VARIABLE) >= "00:05:00" The above works as expected. Hallo All, I want to find the difference between two order dates, which have the order numbers 3 and 1 and write it to another column (named fark) for each Cust_id. When you divide that by 365. The TO_DAYS () function returns the number of days between a date and year 0 (date "0000-00-00"). 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. Description of the above line of code. The TIMESTAMPDIFF function allows its arguments to have mixed types e. Learn its intricacies and enhance your database tasks efficiently. 1. TIMEDIFF () is essential for time-based analysis by enabling you to measure the duration of events or actions. The DIFFERENCE () function compares two SOUNDEX values, and returns an integer. Consider SQL Server function to calculate the difference between 2 dates in years: . Table 9. You could try the following. SQL Server DATEDIFF() 日期相減. Run SQL ». Bid FROM dbo. Example #1 – Calculating Age. The syntax for the DATEDIFF function is as follows: DATEDIFF(datepart, startdate, enddate)All datediff() does is compute the number of period boundaries crossed between two dates. I'm new to working with SparkSQL and tried using the basic datediff function that other SQL syntaxes support I. All you need is to execute the code below and then use the function. These functions assist in comparing, adding, subtracting, and getting the current date and time, respectively. If you want the value as an exact figure (or nearabouts), you should datediff the dates on days, then divide by 30. 1. select datediff ('2019-02-01', '2019-01-27')/365. -- Select [dbo]. createdon,c1. Using T-SQL DATEADD and DATEDIFF function. example, if start_date and end_date differed by 59 seconds, then DATEDIFF (MINUTE,. DECLARE @NumberOfSeconds int SET @NumberOfSeconds = 3843 -- 1 hour, 4 minutes, 3 seconds SELECT @NumberOfSeconds AS 'seconds', CONVERT (varchar, DATEADD (second,. These functions can be used in SQL Server queries to perform various date and time operations, such as filtering records based on dates, calculating date differences, and formatting. TIMEDIFF(date1, date2) Arguments. 更多 MySQL 相關的日期時間函數在這邊. An INTEGER. Mar 27, 2013 at 14:06. Instead, the result is 838:59:59, which makes sense because that is the limit. SQL Command Syntax; SQL Commands List; SQL Functions List; Comparison Operators and Functions. Datediff SQL is key for developers, enabling accurate date calculations. g. format_datetime(timestamp, format) → varchar. In MySQL, the TIMEDIFF () function is used to return the difference between two time or DateTime components. 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. Datediff will return 1 (when you use dd or equivalent), because the day part of the 2nd date is one more than the 1st. T-SQL - Seconds per hour between two datetimes across 2 dates. any help would be appreciated. 2. The unit for the result (an integer) is given by the unit argument. g. 0 and above Returns the difference between two timestamps measured in units. SELECT DISTINCT LEAST (180, DAYS_BETWEEN (current_date, start_date)) as days FROM table2 where expire_date > current_date. Syntax. TIME_TO_SEC only converts the time section so you end up with big negatives if the clock goes past midnight. . Function will return number of days between startdate and enddate. Second parameter would be the last login time, which is already in the database. startdate), MAX(t. [GetBussinessDays] ('02/18/2021', '03/06/2021') -- 11 days CREATE or ALTER FUNCTION [dbo]. To calculate a difference, you need a pair of records; those two records are “the current record” and “the previous year’s record”. DATEDIFF uses the datepart argument to calculate the number of intervals between two dates, rather than the actual amount of time between them. Mangu. Sorted by: 21. 0. It is simple enough to convert this to just HH:MM format if you prefer: SELECT DATEDIFF (day, LAG (Date) OVER (ORDER BY Date), Date ) AS diff_day, CONVERT (VARCHAR (5), CONVERT (TIME, Date - LAG (Date) OVER (ORDER BY Date))) as time_hhmm FROM t; Here is a db<>fiddle. INTERVAL '1-2' YEAR TO MONTH. adddate addtime curdate current_date current_time current_timestamp curtime date datediff date_add date_format date_sub day dayname dayofmonth dayofweek dayofyear extract from_days hour last_day localtime localtimestamp makedate maketime microsecond minute month monthname now period_add period_diff quarter second. Having that at hand, let us calculate the duration of their career with us so far: Calculating the number of weeks between two dates: SELECT CONCAT (first_name, ' ', last_name) AS full_name, employment_date, FLOOR (DATEDIFF (CURRENT_DATE, employment_date) / 7) AS weeks_difference FROM employees; In this example, the. forexData AS S CROSS APPLY ( SELECT TOP (1) T. The function counts whole elapsed units based on UTC with a DAY being 86400 seconds. I know there is one inbuilt function DATEDIFF for this but i want some custom fractional difference like: sDate. Theese examples give you an idea of what I mean: SELECT DATEDIFF(YY, '31/12/2016', '01/01/2017') FakeYears FakeYears 1 SELECT DATEDIFF(HOUR, '01/01/2017 00:59:59', '01/01/2017 01:00:00'). One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. Learn more about TeamsDateDiff (String, Nullable<DateTime>, Nullable<TimeSpan>) Returns the count of the specified datepart boundaries crossed between the specified start date and end date. g. The only function I know is Datediff which only works in Legacy SQL but I'm in Standard SQL. This is because it only compares the date values (it ignores any time values). executeQuery (); while. 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. . startdate and enddate have to be in a format. Edit the SQL Statement, and click "Run SQL" to see the result. Returns. Update2. Consider SQL Server function to calculate the difference between 2 dates in years: . You can't use aliases you created in the SELECT clause elsewhere in the same SELECT clause, so you need to place your FIRST_VALUE () and LAST_VALUE () functions within the DATEDIFF () function: SELECT DISTINCT Test, FIRST_VALUE (CONVERT (DATE, datetime)) OVER (ORDER BY datetime DESC) StartDate,. edited Aug 31, 2012 at 21:52. If you are looking for an integer number only then just cast it. (timestamp) function. SQL Server provides several built-in functions to calculate the difference between dates. 0. DECLARE @then datetime={ts '2014-01-23 12:34:56. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. datediff(endDate, startDate) Arguments. A handy function, DateDiff(), can return for any two the dates the difference in any specific unit that we wish -- hours, seconds, minutes, and so on. Abbrevations. 0. timestamp - t1. But CONVERT() isn't a good solution for this. @asfasas You can always convert the results using a proper mask. DateGroup. The minus sign (-) can also be used to subtract dates. Note that unit values can be different in SQL Server DATEDIFF and MySQL TIMESTAMPDIFF. DATEDIFF Examples Using All Options. The DATEDIFF function will return the difference in specified units (ex. We learned with examples, how to get information. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. It counts the number of year boundaries between two dates. numeric-expression. event =. To convert “Datetime” values to Epoch values, we need to add them to the created table. SELECT id, timeIn, timeOut, TIMEDIFF( timeOut, timeIn ) AS timeDifference FROM table WHERE TIMESTAMPDIFF( SECOND, timeOut, timeIn ) > 180000; This. Custom SQL datediff function. Example: In the travel table, there are three columns: id, departure, and arrival. numeric-expression. SQL Server Syntax DATEDIFF(datePart, date1, date2) The DATEDIFF() function in SQL Server has three required parameters:. That will give you the average differences for each distinct value of col1. e. - ServiceDt (2014/09/22) - ServiceToDt - SettleDt - ReceiveDt - AssessDt (2014/10/01) - New Column ( 9 Days) The New Column must be updated with the Difference between the ServiceDt and AssessDt. DELIMITER $$ DROP FUNCTION IF EXISTS diff_minutes $$ CREATE FUNCTION diff_minutes (t1 TIME, t2 TIME) RETURNS BIGINT READS SQL DATA BEGIN RETURN ( SELECT TIMEDIFF (t1, t2) ); END; DELIMITER ; READS SQL DATA indicates that the function contains statements that read data (for example, SELECT ), but not. 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. ADDTIME(), TIMEDIFF() SQL Time Functions in MySQL- Example Sample output 5 . 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. Description. First, the piece of code required is not compact. SELECT order_logs. First/Last Weeks of the Year¶. The TIMEDIFF function returns the result of expr1 - expr2 expressed as a time value, with a return value of TIME type. SELECT a1. TIME_TO_SEC (TIMEDIFF (endDate, startDate))/3600 as hours. DATE_SUB () Subtract a time value (interval) from a date. Consider SQL Server function to calculate the difference between 2 dates in years: . user_id, TIMEDIFF(MIN(t. No longer do you need to use temporary tables although using staging tables for further calculation could be required. Multiply by 24 -- hours, multiply by 60 minutes, multiply by 60 -- seconds. Applies to: Databricks SQL Databricks Runtime 14. We need to create a table that has at least one column with a specified DATETIME datatype. SQL Server Calculate during 07H00 and 23H00 during weekdays. round ( 48 * ( cast (ActualEnd as float)-cast (ActualStart as float) ),0) /2. The function returns an INTEGER value representing the number of intervals between the two timestamps. Both arguments of this function must be of same type (either time or date-time) . Also it will exclude start date and it will include end date. I) if you need to calculate the elapsed time in seconds between two timestamp columns try this: SELECT extract ( day from (end_timestamp - start_timestamp) )*86400 + extract ( hour from (end_timestamp - start_timestamp) )*3600 + extract ( minute from (end_timestamp - start_timestamp) )*60 + extract ( second from (end_timestamp - start. For example: the difference between 20180115 to 20180220 is 36 days. For larger differences, see DATEDIFF_BIG (Transact-SQL). Now it only runs DateAdd () once, and it can use an index (if one exists), to only load the rows that match the predicate criterion. Share. hàm datediff. both YEAR and YEARS are valid). SELECT Column name, DATEDIFF ( (SELECT MAX (date) FROM table name WHERE Column name < b. For example, if you wanted to find the number of days between two dates, you would use the following query: SELECT DATEDIFF (end_date, start_date, 'day') FROM. Overview: I have tables SHIFT_LOG, SHIFT_LOG_DET & SHIFT_LOG_ENTRY having Parent-Child-GrandChild relationships (one-to-many). datediff (timestamp) function. 較舊的日期減較新的日期會得到負數：. select (test_time - sysdate)*24*60 from test; This value is negative if test_time is lies in. Few examples of DATEDIFF: DATEDIFF - Example 1 Here, in this example, datepart is "day": SELECT DATEDIFF(day,'2016-06-05','2016-08-05') AS DiffDate. SQL Server added the LAG and LEAD functions in T-SQL to help find a previous record related to the key fields. CTE works wonder in such scenarios. DATEDIFF(Day, MIN(joindate), MAX(joindate)) AS DateDifferen. 9999999', '2006-01-01 00:00:00. Before using Datediff use Convert function to convert the varchar data into date. 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. Dive into its nuances, optimize its use, and transform the way you handle date-based tasks. This function is a synonym for timestampdiff function. it returns the difference in days if datepart is day. To get the difference in seconds as we have done here, choose SECOND. mysql> SELECT DATEDIFF ('2010-11-30 23:59:59', '2010-12-31'); -31. That prevents. e. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. Datediff with join returning not expected result. 1. With the help of the datediff. 1. Its value can be year, quarter, month, day, minute, etc. The next example will show the differences between two dates for each specific datapart and abbreviation. The datediff means we can return the difference between two dates based on their specified interval. This function calculates the number of date parts between two specified dates. mySql TimeDiff between TimeStamp in Rows of a Single Table. Bid, ABS(S. Number of weekdays between two dates - StartDate question. The SQL DATEDIFF function calculates and returns the difference between two date values. 0. parse_datetime(string, format) → timestamp with time zone. Date Part Intervals. timediff function. Here I need to calculate the difference of the two dates in the PostgreSQL. This means. The native function CONVERT() might appear to work fine as long as your interval is less than 24 hours. orderno, datediff(day, op1. The DATE type is oldest (it was in the precursor to the SQL-based Informix), and represents the integer number of days since a reference date (where day 0 is 1899-12-31, so day 1 was 1900-01-01). (note that DateDiff, as referenced by @Christoph, does exist, but you can just as easily use the substraction operator -) CDate(Abs([Time] - [MapOriginalStart])) Note that you will probably run into trouble because you're probably not understanding time in Access properly. To count the difference between dates in MySQL, use the DATEDIFF (enddate, startdate) function. DATE () Extract the date part of a date or datetime expression. Hàm DATEDIFF SQL Server có những đặc điểm nổi bật sau: Được dùng để tìm sự khác biệt giữa hai ngày tháng. The result is a signed integer value equal to (date-expression-2 - date-expression-1), in date parts. If either startdate or enddate have only a time part and the other only a date part, DATEDIFF sets the missing time and date parts to the default values. SQL> select 24 * (to_date ('2009-07-07 22:00', 'YYYY-MM-DD hh24:mi') - to_date ('2009-07-07 19:30', 'YYYY-MM-DD hh24:mi')) diff_hours from dual;. @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. Elasticsearch SQL accepts also the plural for each time unit (e. datediff¶ pyspark. with op1 As ( select orderno, opno, restype, LoadedStartDate From orders where opno = 1 ), op4 As ( select orderno, opno, restype, LoadedStartDate From orders where opno = 4 ) select op1. DateDiff to find duration in minutes not working. The TIMEDIFF () function, on the other hand, compares the time, and therefore it returns a more precise result. T he TIMEDIFF() function used in SQL allows to calculate the difference between 2 distinct times. To track the shipping turnaround time, we can use the DATEDIFF () function. SELECT DATEDIFF (YY,'01/02/2011 15:00:00','01/01/2016 14:00:00') 5. This function is a synonym for timestampdiff function. So, LOG table contains shift details. – 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. 2 days. Weeks, quarters, and years follow from that. 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. user_id NOTE: There is a bug in this code if you are using datetime. In SQL Server: Like we do in SQL Server its much easier. This is because it only compares the date values (it ignores any time values). NOTE: This code shows that you cannot go past 24 hours in a time; it just wraps back around (with no error!): declare @FirstTime time (7) SET @FirstTime = '23:05' print @FirstTime Set @FirstTime = DATEADD (HOUR,1,@FirstTime) print @FirstTime. 2. The two arguments of the function can either be hours (TIME) or dates with time (DATETIME), the result will be a time between “-838:59:59” and “838:59:59”. TIMEDIFF () is essential for time-based analysis by enabling you to measure the duration of events or actions. 1. Improve this question. 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(),. From second to datetime sql server. Mariadb - calculate date difference in hour. Timestamp = DATEDIFF (MINUTE, Feeds. Also stop using lazy shorthand like DATE1 - DATE2 (it doesn't work with the data types you should be using since SQL Server 2008). sqlserver. date1, date2: a valid time, datetime, or parsable time/datetime string. 0. Note: TIMEDIFF () requires two arguments for comparison, and TIMEDIFF () subtracts the second argument from the first, then returns the result as the time value. The datepart argument defines the part of the date/datetime in which you'd like to express the difference. SQL to return seconds difference between two rows. So, the difference between Jan 1 20015 and Dec 31 2016 is 1 year. Dim Msg. The Technet article details the return value of the DateDiff Function - note that it's only int. To compare dates in SQL, the most common functions used are DATEDIFF, DATE_ADD, DATE_SUB, and NOW. Difference will be calculated as startdate - enddate . 1. The datediff Function plays an important role in the database management system because datediff functions as a calendar and is very helpful to users. . As @a_horse_with_no_name mentioned using the lag () I wanted in millisecond what the diff was. The datediff function can return the difference between two dates in days, months, years, minutes, etc. DATEDIFF in SQL Server. datediff. 1. 27' which means 270ms rather than 27ms. The WEEK_OF_YEAR_POLICY session parameter controls how the WEEK and YEAROFWEEK functions behave. SQL Server: -- Difference between Oct 02, 2011 and Jan 01, 2012 in years SELECT DATEDIFF (year, '2011-10-02', '2012-01-01'); -- Result: 1. CreatedDate) as Difference from Registration a1 inner join Registration a2 on. 0. 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. Share. Improve this answer. 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. SQL Server: -- Difference between Oct 02, 2011 and Jan 01, 2012 in years SELECT DATEDIFF (year, '2011-10-02', '2012-01-01'); -- Result: 1. TIMESTAMPDIFF ( numeric-expression string-expression. Difference will be calculated as startdate - enddate . -- Select [dbo]. Returns the difference between two timestamps measured in unit s. DATEDIFF Examples Using All Options. With the birth of SQL Server 2016, Microsoft has introduced a new DATEDIFF SQL function, an enhanced version of DATEDIFF known as DATEDIFF_BIG. In SQL Server, you can use DATEDIFF function to get the datetime difference in specified units. TIMEDIFF () returns expr1 - expr2 expressed as a time value. This function takes three arguments: the start date, the end date, and the unit of time you want to measure. First, create and populate sample table (Please save us this step in your future questions):CREATE TABLE face_login_logout (. DateDiff to show Minutes and Seconds. I have two columns that have time data that looks like "2017-12-06 18:50:27 +0000" . I'm trying to calculate the difference of hours between two TIME variables. Must be one of the values listed in Supported Date and Time Parts (e. select ID, emp_name, emp_dateOfBirth from Employee. Syntax. Syntax. 4 Answers. 000' SELECT CAST (@EndTime - @StartTime as Time) As TimeDifference. (ORDER BY [seat number])rr FROM #test) SELECT c1. Here is a brief and simplified extract of my current dataset: All my users currently have a start time and end time for various actions they complete. On Db2 11. SQL Server DATEDIFF() 日期相減. just substitute StartDate and EndDate for your column names, and tableName for the actual table name. Syntax TIMEDIFF( <date_or_time_part> , <date_or_time_expr1> , <date_or time_expr2> ) Arguments date_or_time_part The unit of time. 789'}; SELECT LEFT( CONVERT(varchar(10), DATEADD(second, DATEDIFF(second, @then, GETDATE()), {d '1900-01-01'}), 8), 5); Here's what it does: Calculates the difference in seconds between @then and now (GETDATE()) Adds that number of seconds to 1900-01-01. 1. Description. In case you use a DATE value, the TIMESTAMPDIFF function treats it as a DATETIME value whose. Using timestamp column value in TIMEDIFF function. Edit the SQL Statement, and click "Run SQL" to see the result. Here, you'd like to get the difference in seconds, so choose second. Run SQL ». The resulting column will be in INTERVAL DAY TO SECOND. 6. Mysql timediff returning two different values. 1. ORDER BY DATEDIFF(endDate, starDate), TIMEDIFF(TIME(endDate), TIME(starDate)); Probably performs terribly, though. sql; google-bigquery; datediff; date-difference; Share. startdate: The starting datetime value. #1582 - Incorrect parameter count in the call to native function 'DATEDIFF'. 000' SELECT CAST (@EndTime - @StartTime as Time) As TimeDifference. If the value returned from TIMEDIFF() is greater than 5 minutes, the record it represents will be returned. ). Sql server supports adding and subtracting on Datetime data type, so you can simply do something like this: DECLARE @StartTime datetime = '2016-05-10 02:25:34. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest,. You'd probably need to tweak this to handle the. Syntax: The following syntax can be used in a SQL query: SELECT TIMEDIFF(hour1,. 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. The TIMESTAMPDIFF function allows its arguments to have mixed types e. --Changing current database to the Master database allows function to be shared by everyone. Quick Example : -- The difference is days between today and yesterday SELECT DATEDIFF ( dd , GETDATE ( ) - 1 , GETDATE ( ) ) ; -- Returns: 1 -- The number of seconds in 24 hours SELECT. timediff() from mysql select. Timediff in MySQL wrong values. g. Datetime2 Overflow Issue-1. Covering popular subjects like HTML, CSS, JavaScript,. Something like: SELECT DATEDIFF (d, StartDate, EndDate) FROM tableName. 1. forexData AS T WHERE T. sql. 更多 SQL Server 相關的日期時間函數在這邊. In most cases, though, what you really want is the number of days from the first date to the second date. The solution is to use the DATEDIFF () function. This function. functions. The DATE type is oldest (it was in the precursor to the SQL-based Informix), and represents the integer number of days since a reference date (where day 0 is 1899-12-31, so day 1 was 1900-01-01). 0000000' , '2014-03-19 07:20:00. It returns an integer value that represents the number of specified date or time units between two dates or times. If you are using Sql Server 2012+ then use. Then , I searched about MariaDB's DATEDIFF and I saw this , I figured out. String concatenation will build '1' + ',' + '27'. Timediff in MySQL wrong values. However I see two disadvantages with this method. datediff is always 1 number less than I need-5. The MySQL TIMEDIFF() function returns the difference between two time or datetime values. 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, . year: January 1; quarter: January 1, April 1, July 1, October 1; month: the first day of the month; week:. 1 Answer. The SQL DATEDIFF () function is an in-built function in SQL that is used to return the difference (as a signed integer value) between two dates or times. datediff (to_date (String timestamp), to_date (String timestamp)) SELECT datediff (to_date ('2019-08-03'), to_date ('2019-08-01')) <= 2; to_date is unnecessary if the column is already in 'yyyy-mm-dd' format. It is the unit in which the DATEDIFF () function returns the difference between a start date and an end date e. Finally, we will use a CASE statement. Run SQL ». Datediff () will also allow you to take month, hour, or other time measures. Below would correct the most popular answer to return hours as an integer and minutes as a decimal (ie 6. Q&A for work. Finding the seconds difference can be done as follows: SELECT (mod_date_time - create_date_time) * 24 * 60 * 60 as "seconds_diff" FROM t1. TIMEDIFF () is useful for filtering records or data based on time criteria, such as selecting records within a specific time range. This function was run on 14 Jan which gives the result of 39. The value returned is an integer.