Posted on May 11, 2021 by Ian. But this calculation is done only in one unit at a time. MySQL TIMESTAMPDIFF() Function - The DATE, DATETIME and TIMESTAMP datatypes in MySQL are used to store the date, date and time, time stamp values respectively. 0 Runtime Version v4. So, you can use TIMESTAMPDIFF for your purpose. To define a column that includes a fractional seconds part, use the syntax type_name ( fsp) , where type_name is TIME , DATETIME, or TIMESTAMP, and fsp is the fractional seconds precision. MySQL interval values are used mainly for date and time calculations. This will return difference in days. I have two columns that have time data that looks like "2017-12-06 18:50:27 +0000" . Yes, because the timestamp handles the leap years. This makes it suitable for producing day intervals for DATE , DATETIME , or TIMESTAMP values. In PostgreSQL, you can take the difference in years, multiply by 12 and add. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. First, how do you get the difference between two times in seconds? The datediff() function is probably not the best function to use in such a situation. date2: This is the second date that you want to compare. If I put the time earlier than this time, it adds an extra day. I have a requirement to get time difference between two DateTime's in HH:MM format not decimal. select *, cast ( (cast (begin_date as date) - cast (end_date as date) YEAR) as decimal (3,2)) AS year_diff from x. 03 sec) You may. select (DATE1 - DATE2) as days, (DATE1 - DATE2) * 24 as hours, (DATE1 - DATE2) * 24 * 60 as minutes, (DATE1 - DATE2) * 24 * 60 * 60 as seconds, (DATE1 - DATE2) * 24 * 60 * 60 * 1000 as milliseconds from dual. DAY_SECOND; DAY_MINUTE; DAY_HOUR. It shows us that there are 36 hours, 15 minutes, and 35 seconds between the two. "timestamp" is a column in MYSQL which I hold a timstamp as such "1365793346". SELECT TIMEDIFF (end_time,start_time) AS "total" FROM `metrics`; meaning 116 hours, 12 minutes and 10 seconds. MySQL DATEDIFF() With Negative Days Difference. SELECT GETDATE () 2018-04-05 15:53:01. bdate) as `DIFF` FROM atable LEFT JOIN btable ON atable. I've been busy with this for hours, but I cant get it to work. To convert back, use FROM_UNIXTIME () function. Besides MySQL DATE, of the database management systems most useful commands is MySQL DATEDIFF. HTH. You can use it in the same way as DATEDIFF function. . Also you should use in DATEDIFF the CLOSE_APP time first and then START_APP time in this case you will get positive value result. datePart is the part of the date to return. select datediff('2016-04-14 11:59:00', '2016-04-13 12:00:00') returns 1 instead of expected 0. mysql> SELECT DATEDIFF ('2010-11-30 23:59:59', '2010-12-31'); -31. 2 days, but Snowflake will produce 1 because 2 is 1 more than 1. SubscrpEndDate__c) AS 'SubscriptionDueDate' According to the manual: DATEDIFF(expr1, expr2) returns expr1 − expr2 expressed as a value in days from one date to the other. DATEDIFF Function. I have table with changelog, every row give me specify inormation about actions. g. Only the date parts of the values are used in the calculation. Seconds, Minutes, Hours, Days, Weeks, Months, Quarters, Years. The units in which DATEDIFF reports the difference between the startdate and enddate. Take a look at the code below - notice the 1 millisecond difference in the two returned values. The DATEDIFF() function returns the time between two dates. The MySQL Minute () Function is used to return the minute part from the given DateTime value. SQL Server: Round Date Up. adate, INTERVAL 10 DAY), btable. Share. SQL 教學. microseconds. Note: time1 and time2 should be in the same format, and the calculation is time1 - time2. *, TO_SECONDS(a. If you're using Unix Timestamp (integer), then it would be even easier: select * from MyTab T where UNIX_TIMESTAMP () - T. Modified 7 years, 7 months ago. 5. The TIMEDIFF () function returns the difference between two time/datetime expressions. Commonly used datepart units include month or second. CONVERT(date[time], 'yourdata', FORMAT). About; Products For Teams;. While DATEDIFF is straightforward, there are nuances to consider. The number of days is calculated using the MySQL DATEDIFF() function. The goal here is basically too add 15 seconds or reset the date to where only 15 seconds are left. SQL Server DATEDIFF function returns the difference in seconds, minutes, hours, days, weeks, months, quarters and years between 2 datetime values. Here interval is used to determine the difference between the specified dates. For up to date solution see jurkas' answer above. 更多 SQL Server 相關的日期時間函數在這邊. 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. Plus one for the example that shows GETDATE () and not just DATEDIFF, which is part of what OP needs. SELECT DATEDIFF ("2020-11-12", "2020-11-19"); MySQL DATEDIFF() With Negative Days Difference. SQL Server: -- Get difference in days SELECT DATEDIFF(dd, '2022-09-01', '2022-09-05'); # 41. for more on date functions MySQL documentation. 1 Answer. expr1 and expr2 are date or date-and-time expressions. 30319) to my 4. SELECT order_id, required_date, shipped_date, CASE WHEN DATEDIFF (day, required_date, shipped_date) < 0 THEN 'Late' ELSE 'OnTime'. Share. 000. Here the date1 is less than date2, so the return value is negative. Improve this question. uuuuuu' format. SELECT * FROM tableName WHERE TIMESTAMPDIFF (MINUTE,timestamp,NOW ()) < 10. Instead, use the dateAdd function on todays date, and compare the database table column to the result of that single calculation. This works fine: SELECT. I am running SQL Server 2005. In this case, the enddate is arrival and the startdate is departure. First, how do you get the difference between two times in seconds? The datediff() function is probably not the best. 如果 date1 的日期晚于 date2 的日期，它返回一个正数，否则返回一个负数或者 0。. 2. AccountNumber AND T2. SQL 語法. DATE_FORMAT () Format date as specified. expr1 and expr2 are date or date-and-time expressions. TIMESTAMPDIFF ( numeric-expression string-expression. 1. These functions assist in comparing, adding, subtracting, and getting the current date and time, respectively. It depends on how NULL values are to be interpreted, and the use of the isnull function. Subtracts the 2nd argument from the 1st (date1 − date2). This is alright as DATEDIFF() supports a negative date difference. Definition and Usage. String otherwise. Calculates the difference between two date, time, or timestamp expressions based on the date or time part requested. AI is only as good as the data: Q&A with Satish Jayanthi of Coalesce. The following table summarizes the difference between these two functions: TIMEDIFF () TIMESTAMPDIFF () Requires 2 arguments. 1. The TIMESTAMPDIFF function returns the result of begin - end, where begin and end are DATE or DATETIME expressions. SELECT DATEDIFF (second, '2019-12-31 23:59:59', '2020-01-01 00:00:00'); A value of 1 is returned because the boundary of seconds is. This function comes in two flavours: MySQL 2 argument version. To check the time difference using bigger units you can use TIMEDIFF with TIME_TO_SEC. Hot Network QuestionsDATEDIFF(hour, start_date, end_date) will give you the number of hour boundaries crossed between start_date and end_date. DATEDIFF () 函数只比较 date1 和 date2 的日期部分。. dll Version 6. TIMESTAMPDIFF. Let’s take some examples of using the DATEDIFF() function. @Enrico - Not true. [date], getdate ()) between 1 and 180. Create a new column (ALTER TABLE) then run an UPDATE on it. The above example will show the number of days elapsed from December 15th, 2020 until today. Month-difference between any given two dates: Have a look at the TIMESTAMPDIFF () function in MySQL. Description. The MySQL DATEDIFF function only considers the date portion of the datetime values, and returns an integer number of days difference. 6. Only the date parts of the values are used in the calculation. Below is an example with 2 queries with the same results. To calculate the difference between the arrival and the departure in T-SQL, use the DATEDIFF (datepart, startdate, enddate) function. Second option is wrong when start hours/minutes/seconds is less then end. id` + 1 ; Additionally, if there is always a gap between different e. select CONCAT('Month: ',MonthDiff,' Days: ' , DayDiff,' Minutes: ',MinuteDiff,' Seconds: ',SecondDiff) as T from (SELECT DATEDIFF(MONTH, '2017-10-15 19:39:47' , '2017-12-31 23:59:59') % 12 as MonthDiff,. Applies to: Databricks SQL Databricks Runtime 10. 更多 MySQL 相關的日期時間函數在這邊. MySQL DateDiff Seconds. g. HTH. Definition and Usage. op_name = 'Assembly'. What do you intend to do with that DATEADD() function? What it's doing is turning your DATEDIFF() output into a DATETIME field, which you then CONVERT() to a time format. The problem is that the query is giving only the difference in hours. From the condition in the where clause it appears that you are trying to get data for the same date, however using the datediff for the same day always would result 0. Let’s see a few examples of SQL subtract date from the DATEADD function: In the below example, we are adding one month to the existing date ‘20220730’. 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. Returns the time argument, converted to seconds. DATEDIFF doesn't look at any smaller units than the one specified in the first argument. Date ) AS NextDate FROM YourTable T1 ) AS T. I have to show the difference, currently I used a datediff in the stored proc which just shows the difference of the days :( but i need to show the difference in days:hours:minutes:seconds if possible. the datediff truncate to the unit you are finding the diff over. SELECT DATEADD (month, 1, '20220730'); The below DATEADD will add 1 year to the provided date value, the year changed from 2022 to 2023. So, DATEDIFF (day, '2020-01-13 23:59:58', '2020-01-14 00:00:08') will return 1, even though the difference is only few seconds, because the given interval crosses the boundary of a day (midnight). How to compare two dates ignoring seconds in sql server. I have a query in which I am pulling the runtime of an executable. Again, the expected results would be a value of 1. 1901 to 2155. you need only the days from the year of your second. Most often, losing the date information and keeping only time information in a field is misguided. 15 between 2 values that are 1 year, 1 month and 15 days apart. 8494441'. date, DATEDIFF(mytable. The result returned by TIMEDIFF() is limited to the range allowed for TIME values. CONVERT (CHAR (8),DATEADD (SECOND,DATEDIFF (SECOND,MIN (OLDESTRECORD),GETDATE ()),0),108) to get the HH:MM:SS, but when the hours is more than 24 hours it just shows the hours part. For example, only seconds, or only minutes or only hours. From the condition in the where clause it appears that you are trying to get data for the same date, however using the datediff for the same day always would result 0. 0. MySQL provides a set of functioHi, I want to find the the exact difference between two dates in seconds through MySQL query. UNIT can be SECOND. SELECT * FROM viewname. 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 DateDiff does not return negative. One expression may be a date and the other a datetime; a date value is treated as a datetime. SELECT mytable. day_second;. The following statement uses the DATE_ADD() function to add one second to 1999-12. to convert strings to date or datetime, you should use . Follow asked Apr 7, 2016 at 20:50. So, for example, DATEDIFF (last_order_date, first_order_date. DATEDIFF accepts either. Example 1 The following example calculates the difference in months between 2020/05/18 and 2022/05/18: SELECT DATEDIFF(month, '2020/05/18', '2022/05/18'); /*. Consider SQL Server function to calculate the difference between 2 dates in months: SQL Server : -- Difference between Oct 02, 2011 and Jan 01, 2012 in months SELECT DATEDIFF ( month, '2011-10-02', '2012-01-01') ; -- Result: 3. ROUND SIGN SIN SQRT SUM TAN TRUNCATE Date Functions ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME DATE DATEDIFF DATE_ADD DATE_FORMAT DATE_SUB DAY DAYNAME DAYOFMONTH DAYOFWEEK DAYOFYEAR EXTRACT. I've been busy with this for hours, but I cant get it to work. It is to be noted that two expressions must be the same type. 103 of the German Basic Law forbid a second trial after an acquittal?YEAR. It returns the number of days between two dates or datetimes. Consider SQL Server function to calculate the difference between 2 dates in months: SQL Server : -- Difference between Oct 02, 2011 and Jan 01, 2012 in months SELECT DATEDIFF ( month, '2011-10-02', '2012-01-01') ; -- Result: 3. Also note that unlike SQL Server or MySQL, in Oracle you cannot perform a select statement without a from clause. g. If the int data type is insufficient for the difference between two dates, you should use the DATEDIFF_BIG function. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. 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. Note: time1 and time2 should be in the same format, and the calculation is time1 - time2. MySQL datediff in a. Grouping Results by Day. I've also used cross apply to only write the datediff once instead of three times. Do you guys know how to remove the minutes and seconds from a datetime? Instead of 2012-03-27 12:57:21. It is better if you alias both copies of the table: SELECT w1. id` = b. And after I apply my conditions with a WHERE statement. 較舊的日期減較新的日期會得到負數：. PostgreSQL - Date Difference in Months. 000 and the function returns the number of minutes since the beginning of the previous century. Here is an example that uses date functions. SELECT datediff (minute, stime, etime) from Exceptions2 where stime = [exceptions2]. Date arithmetic in MySQL is quite flexible. If Value is in negative then DateDiff should give output as 0 instead of -value. The MySQL TIMEDIFF() function returns the difference between two time or datetime values. Why does Art. The second parameter of DATEDIFF takes a datetime so your string is implicitly converted to a datetime. To check the time difference using bigger units you can use TIMEDIFF with TIME_TO_SEC. Date Part Flexibility: Years, months, days, hours, minutes, and seconds are among the date parts that are supported. 1 Answer. The MySQL DATEDIFF function returns the difference in days between two date values. Sorted by: 2. This function adds a number (a signed integer) to a datepart of an input date, and returns a modified date/time value. Definition and Usage The DATEDIFF () function returns the number of days between two date values. SELECT (UNIX_TIMESTAMP (endDate)-UNIX_TIMESTAMP (startDate))/3600 hour_diff FROM tasks. millisecond uses the hour, minute, second, and first three digits of the fractional seconds. Returns datetime_expr2 − datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. id` AND a. in the image odate is the start date and edate is the end date. The MYSQL DATEDIFF () function accepts two date or, date-time values as parameters, calculates the difference between them (argument1-argument2) and returns the result. The MySQL DATEDIFF () function allows you to count the number of days between two different date expressions. MySQL's DATEDIFF function just takes two parameters: SELECT orderNumber, DATEDIFF (shippedDate, orderDate) AS day FROM datenumtest; Note the order of the date parameters used, which would return some positive number of days assuming that the shipping date be greater than the order date. DATE_ADD () Add time values (intervals) to a date value. 0. 較舊的日期減較新的日期會得到負數：. We can find the difference between the two dates using the following dateparts with the DATEDIFF function. To do datediff, you have to have 2 date or datetime-values. so if date2 is yesterday and date1 is today it will provide something like this: 00:00:07 I saw the timestampdiff function a couple of times, but I am using MySQL in Domo, and this function is not offered there. You can use DATEDIFF(MINUTE, StartDateTime, EndDateTime) / 60. 000' Set @clockout = '2015-01-03 12:02:42. I have two rows. For example the following statement produces 99. In case you use a DATE value, the TIMESTAMPDIFF function treats it as a DATETIME value whose. The first date is adjusted by adding 1 year, and the second date is adjusted by adding 1 month. You shouldn't be converting to time - it is meant to store a point in time on a single 24h clock, not a duration or interval (even one that is constrained on its own to < 24 hours, which clearly your data is not). EXPLANATION: In this example, the MySQL DATEDIFF() function calculates the number of days between the two dates 2023-03-07 and 2023-03-01, but with an interval adjustment. id FROM weather w1 JOIN weather w2 ON DATEDIFF (w1. The following example uses the DATEDIFF() function to calculate the difference between two DATE. Rounding problems with. date) FROM mytable LEFT JOIN mytable AS t2 ON t2. The SQL DATEDIFF () function returns a long value specifying the number of time intervals between two specified dates . DB : SQL SERVER 2008. recordDate) = 1 AND w1. Ask Question Asked 5 years, 6 months ago. I have two dates date column like '2017-12-29' and '2018-01-05' the datediff between these dates is 8, but i want to know the datediff which fall on 2018 which should be 5. It's free to sign up and bid on jobs. SQL Server DATEDIFF function returns the difference in seconds, minutes, hours, days, weeks, months, quarters and years between 2 datetime values. What this is doing is taking the current seconds left from the 'end_dt' subtracting 15 and adding it to the 'end_dt', basically giving you 15 seconds left. 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 syntax for the DATEDIFF function in MariaDB is: DATEDIFF( date1, date2 ) Note. Timestamp >= a. 2 Answers. 0. To count the difference between dates in MySQL, use the DATEDIFF (enddate, startdate) function. NOW (3) will give you the present time from your MySQL server's operating system with millisecond precision. TimeStamp - INTERVAL 3 SECONDS AND b. +1 For keeping the query sargable and not wrapping the timestamp. First we calculate the absolute difference in seconds and put that in a variable; then we check if we get one or more of each (day hour minute), and if so we calculate how any we get and put that in a variable; for units after the largest, we do the same, but first we subtract the seconds allotted to the previous unit from our overall difference If you want to check that the difference is less than 1 second, that means that the two dates must be the same, in which case you can simply use the equivalency operator. If data is stored as a DATE or DATETIME data type, it is stored as a binary value, NOT in any particular human-readable format. com)compare date mysql; mysql compare datetime to another datetime; mysql compare timestamp in minutes; mysql compare datetime to another datetime; compare php date with mysql date; date diff sql server; mysql date between two dates; hour differeence in mysql; mysql timestamp vs datetime; mysql get difference between two dates;. `s. 0000000'); --Syntax DATEDIFF ( datepart , startdate , enddate ) You can make use of DateDiff for this. To truncate a datetime2 (7) to 3 places (aka milliseconds): -- Strip of fractional part then add desired part back in select dateadd (nanosecond, -datepart (nanosecond, TimeUtc) + datepart (millisecond, TimeUtc) * 1e6, TimeUtc) as TimeUtc. Here is. Well, it was very simple and straight forward as its name suggest. 03 sec) You may. Syntax:The DATEDIFF_BIG () function returns a 64-bit bigint data type, that can store values up to 9,223,372,036,854,775,807. It outputs the number of days between two dates. It is important to understand that the DATEDIFF function is both reliable and valid in both cases. Is there a possibility. mysql 날짜 차이 가져오기 (datediff, timestampdiff 함수) 설명 mysql에서 두 날짜간의 차이를 가져올 때 사용하는 함수가 두 가지가 있습니다. The MySQL DATEDIFF () function takes two dates and returns the number of days between them. DateGroup. Thank - I converted the date-time strings to seconds - calculated the difference - and then converted the seconds back to hours-minutes. DATEDIFF function in MySQL. In PostgreSQL, you can take the difference in years, multiply by 12 and add. The TIMEDIFF () function returns the difference between two time/datetime expressions. UPDATE MyTable SET NewIntColumn = DATEDIFF (SECOND, '19000101', MyDateTimeColumn) 19000101 is the SQL Server epoch. earthquakes; Extracting only time from date-time column in SQL | Image by Author. DATE_SUB () Subtract a time value (interval) from a date. The way it works is, you provide two arguments (one for each date), and DATEDIFF() will return the number of days between the two dates. To count the difference between dates in MySQL, use the DATEDIFF (enddate, startdate) function. FROM_UNIXTIME (ms * 0. DATE () Extract the date part of a date or datetime expression. The returned type of the NOW () function depends on the context where you use it. DATEDIFF () returns ( expr1 – expr2) expressed as a value in days from one date to the other. hour uses only the hour and disregards all the other parts. début)/365) Here is my table and the result in the 'montant_annuel' column:This situation calls for the use of MySQL ADDTIME () function. Alternatively, you can use either of the functions TIMESTAMPDIFF() and UNIX_TIMESTAMP(), both of which return integers. Search for jobs related to Mysql datediff seconds or hire on the world's largest freelancing marketplace with 23m+ jobs. 3. But the output I get is 1 (day). I will use floating point maths to make my point. Improve this question. Viewed 18k times. MySQL DATEDIFF () returns the number of days between two dates or datetimes. , begin is a DATE value and end is a DATETIME value. The datepart. Only return data type is. The age in days between the two dates is either 2 or 3 days, but in one case the DATEDIFF function returns an Int data type. The datepart argument can be microsecond, second, minute, hour, day, week, month, quarter, or year. from_days converts days into a. mm. For example, DATEDIFF(milliseconds, '00:00:00',. 380. SQL SELECT DATEDIFF (end_time, start_time) as `difference` FROM timeattendance WHERE timeattendance_id = '1484' start_time = 2012-01-01 12:00:00 end_time = 2012-01-02 13:00:00. This function takes two arguments: The end date. The timestamp difference returns the difference between two dates in seconds. Fisrtly we pass current_timestamp and first date value and return type SECOND as a parameters like : DATEDIFF ('SECOND', DATE '1970-01-01', CURRENT_TIMESTAMP ()) * 1000 the returned result is current_time's millisecond for us. Example. This is because it only compares the date values (it ignores any time values). , year, quarter, month, day, hour, minute, second), startdate is the starting date or time, and enddate is the ending date or time. If you want to find the date/time difference between the first and the last timestamp of each ticket, there are several functions that can help you: select ticket_id, timediff (max (timestamp), min (timestamp)) as diff, timestampdiff (hour, min (timestamp), max (timestamp)) as diff_in_hours, timestampdiff (minute, min (timestamp), max. 1. Note that unit values can be different in SQL Server DATEDIFF and MySQL TIMESTAMPDIFF. SELECT TIMEDIFF(NOW(), '2010-11-26 12:00:00'); If you want it as seconds, use the unix timestamp features in MySQL or in PHP, you can convert MySQL dates to PHP quickly using. Datediff between hours. Date difference in seconds: SELECT (strftime("%s", "now") - DateCreated) FROM Payment; -- Output: 956195. I wrote a query using TIME_TO_SEC function, it worked perfectly, but then the integration tests failed, because there I had H2 instead of MySQL. TIME) AS `Secs` FROM theTable AS s LEFT JOIN theTable AS b ON a. MySQL TIMEDIFF () function. The WEEK interval in DATEDIFF does not actually calculate the number of weeks, instead it calculates the number of instances that. 1. SELECT SUM(DATEDIFF(endtime, starttime)) FROM somerecordstable WHERE starttime > '[some date]' AND endtime <= '[some date]'Even in the below answers they are adding 3 parameters. 6222691' DECLARE @date2 datetime2 = '2022-01-14 12:32:07. MySQL DATEDIFF () 函数返回两个日期值之间的天数。. Is there a trivial way I can convert the time there to return an integer (seconds)? mysql; sql; Share. It supports time series analysis by allowing you to calculate. In MySQL, there is a 2 argument verison of the DATEDIFF() function, where the result produces the number of days between the two dates. Similarly, the Second () SQL time Function will return the second. Mysql Timediff function is not working for me for long date. second, ss, s = Second; millisecond, ms = Millisecond; date1, date2: Required. Learn MySQL Tutorial Reference Learn PHP. Requires 3 arguments. MariaDB: DATEDIFF Function. Difference between two dates in mysql. Follow asked Dec 31, 2011 at 4:46. Syntax. Works. Just. MySQL DATE_ADD function examples. The Overflow Blog Edge and beyond: How to meet the increasing demand for memory. Alternatively, for the difference between dates in minutes, hours, days, weeks, months, or years – SELECT TIMESTAMPDIFF (UNIT, `DATE-A`, `DATE-B`) FROM `TABLE`. Note: time1 and time2 should be in the same format, and the. Can anyone help to take a look? Thanks! Update: Turns out i forgot to put RETURN DECIMAL(10,2). UNIT can be SECOND MINUTE HOUR DAY WEEK. The MySQL DATEDIFF syntax is:. If values of seconds are greater than zero, a decimal number may be produced. To create an interval value, you use the following expression: Followed by the INTERVAL keyword is the expr that determines the interval value, and unit that specifies the interval unit. In MySQL, you can use TIMESTAMPDIFF function. From second to datetime sql server. If you want the result in hours you should use Timestampdiff. startdate and enddate have to be in a format. sql. So for the first argument I select all the dates of the 'idTime_stockout' column and for the second argument all the dates of the 'idTime_resupply' column. As shown clearly in the result, because 2016 is the leap year, the difference in days between two dates is 2×365 + 366 = 1096. orders table as in Example 3, we can use DATEDIFF () to find the interval between today's date and the date on which an order is placed. 0. I only put RETURN DECIMAL. Using the DATE () function in MySQL, you can precisely extract the date from the Datetime datatype column.