4. EntityFrameworkCore. This is the query I am working on right now. The calculations for hours and days are correct. For the DATE and DATETIME range descriptions, “ supported ”. Yes, because the timestamp handles the leap years. I have query in Mysql which return minutes using TIMESTAMPDIFF in table. I am using below code for today and database date. 참고: DATEDIFF, TIMESTAMPDIFF는 날짜 차이에 대한 계산. SELECT test_name, TIMESTAMPDIFF (MINUTE,`start_time`,`end_time`); or you can do it without Backticks. elapse)/60 as diff from( SELECT c1. Follow. Using TIMESTAMPDIFF : NOTE:- Following Assumptions are made for TIMESTAMPDIFF () function. 2,964 3 3. It's a powerful tool for performing date and time calculations, allowing you to manipulate temporal data in various ways. But the output I get is 1 (day). To calculate the difference between the timestamps in MySQL, use the TIMESTAMPDIFF (unit, start, end) function. Improve this answer. Even if there where, seem like nice trade off an extra column for not having to calculate the diff for each row on each query! Oh, and you can just retrieve what you want like this: Timer. I have my SQL statement like this trying to get the difference in 2 timestamps greater than 10 minutes. Depending on your data and the max values, that may eliminate enough rows to make the non-sargable search "less painful". SELECT TIMESTAMPDIFF (SECOND, '2010-11-29 13:13:55', '2010-11-29 13:16:55') Which can be modified to return DAY YEAR MONTH. dtStart, f. 2 Answers. Definition and Usage The TIMEDIFF () function returns the difference between two time/datetime expressions. +1 For keeping the query sargable and not wrapping the timestamp column within a function for comparison. AVG( TIMESTAMPDIFF(YEAR, tanggal_masuk, tanggal_yudisium ) ) tanggal_masuk and. We must use date functions for this. I want to get the difference between 2 datetime where datetime 1 is now () and datetime 2 is the previous log of particular user. g. 1 Answer. Viewed 2k times. MySQL DATEDIFF: Calculate Days Between Two Dates. mysql get first day of the current month. If you want to read about CONVERT () and CAST () here is the link. montant / (datediff (NEW. That should give you the result you want. 6. Use this version: CONCAT ( TIMESTAMPDIFF (day, TIME_START, TIME_END), 'd ', MOD (TIMESTAMPDIFF (hour, TIME_START, TIME_END), 24), 'h ', MOD (TIMESTAMPDIFF (minute, TIME_START, TIME_END), 60), 'm' ) AS. The solution is to use the TIMESTAMPDIFF function. The TIMESTAMPDIFF function is supported by most major databases, including MySQL, PostgreSQL, and SQL Server. Dec 18, 2014 at 6:20. id asc I receive an error: check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM statistic a INNER JOIN statistic b ON b. 1 Answer. Parameter 1 - unit, it is a type of output you want, such as MICROSECOND, SECOND MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, YEAR. You can use TIMESTAMPDIFF function for getting Approximate difference between two timestamps. runTime,NOW()) > 20. For example: CREATE TABLE t1 (t TIME (3), dt DATETIME (6)); The fsp value, if given, must be in the range 0 to 6. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. To calculate the difference between two date/datetime expressions, use TIMESTAMPDIFF. It accepts two TIMESTAMP or DATETIME values (DATE values will auto-convert in MySQL) as well as the unit of time we want to. I believe the only way to do it here is to make a trigger. . Here is an example that uses date functions. [EDIT] If you want "everything that is greater than 4" to just be a single group, then you have to transform the values 5, 6, 7, . So the function is returning the difference between the second and third parameters in the units defined by the first parameter. 2022/11/26. SELECT * FROM foo WHERE is_relevant = true ORDER BY ABS(TIMESTAMPDIFF(SECOND, `foo`. TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2) where unit argument, which should be one of the following values: MICROSECOND (microseconds), SECOND, MINUTE,. If it helps someone who knows MySQL answer, SQL Server isn't "rounding up"; SQL Server just counts the number of day boundaries between the two times. Some days have an extra second or two seconds depending on the year. First, it attempts to find a match for the %d format specifier, which is a day of the month (01…31), in the input string. Jan. DATE_SUB () MySql date_sub () function subtract a time value (as interval) from a date. Try adjusting your query to use modern join syntax, to say. It doesn't matter how off the number in the month segment of the start date from that of the end date. 0 (very out of date). *, timestampdiff (minute, start_time, end_time) as minutes from t; You can incorporate this into a view, if you want it readily available: create v_t as select t. The MySQL TIMESTAMPDIFF () function is used to find the difference between two date or DateTime expressions. Combine SUB_DATE AND TIMEDIFF to substract 1 hour in mysql. But: COALESCE: first column null: 8363 vs IFNULL: 8811. 0. mysql学习 mysql. Follow. The DATE, DATETIME, and TIMESTAMP types are related. You can use TIMESTAMPDIFF function for getting Approximate difference between two timestamps. TIMESTAMPDIFF (DAY, '2011-12-10', '2011-12-20') will return 10. because the diff from 08/18 to 12/08 is 3 until the 12/17 it return 3 after it will return you 4. The following query selects all rows with a date_col value from within the last 30 days: . About;. Mysql TIMESTAMPDIFF for time datatype return negative value. Just make the second argument '2015-01-01' and as long as your EndDate is good, it should work. Returns datetime_expr2 - datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. 2 Answers. So we could modify the previous example so that TIMESTAMPDIFF. To determine how many years old each of your pets is, use the TIMESTAMPDIFF () function. TIMESTAMPDIFF () in MySQL returns a value after dividing one DateTime expression by another. 2「日時データ型」 のルールを使用して、日付の 2 桁の年の値が 4 桁の形式に変換されることを忘れないでください。. The STR_TO_DATE () function may return a DATE , TIME, or DATETIME value based on the input and format strings. 1 Answer. FollowTIMESTAMPDIFF. TIMESTAMPDIFF not working on mysql query in codeigniter. MySQL DATE_FORMAT () formats a date as specified in the argument. Because the number 21 matches with the %d specifier, the function takes 21 as the day value. To avoid having to repeat yourself, you can wrap the calculation: SELECT HOUR(x. Share. 1 Answer. arrival_time) as HourDiff FROM airlines a WHERE TIMESTAMPDIFF(hour, a. 5 (nine and a half hours)? Thanks! I've already tried using TIMEDIFF and doing the substract but it returns 9. 1 Answer. DATETIME: used for values that contain a date and time. approved_on, slot. SELECT. SELECT id, Present, Date, Time, SEC_TO_TIME (TIMESTAMPDIFF. orders_id, orders_status_history. one of the following could be used when comparing dates in MySQL: DATEDIFF () Subtract two dates TIMEDIFF () Subtract time TIMESTAMPDIFF () Subtract an interval from a datetime expression PERIOD_DIFF () Return the number of months between periods. time_zone which I generally won't want/be able to change, and; The built-ins behavior around the time of DST changes (if global time zone uses DST) results in information loss in some use cases,I would recommend instead converting the time differences to minutes and displaying the total number of hours as a decimal number, rather than a time: SELECT ROUND (SUM (TIMESTAMPDIFF (MINUTE, Initial, Final) / 60. MySQLのTIMESTAMPDIFF ()関数を使うと、日時同士の差分計算がしやすくて便利. About;. For example: Profile table: Name; Gender; DOB. SELECT timestampdiff (minute,created_at,now ()) AS TIMEDIFF. timestampdiff Description. Puede ser uno de los siguientes. Select TIMESTAMPDIFF( YEAR, startdate, now() ) as _year ,TIMESTAMPDIFF( MONTH, startdate, now() ) % 12 as _month ,FLOOR( TIMESTAMPDIFF( DAY, startdate, now() ) % 30. Provide details. mysql timestampdiff() ignoring weekends. The common uses of MySQL ADDDATE () function -. 2. If TIMESTAMPDIFF () returns NULL, we can find rough age by subtracting the current year from the year of birth. MySQL version: 5. TIMESTAMPDIFF timestampdiff description Syntax INT TIMESTAMPDIFF(unit, DATETIME datetime_expr1, DATETIME datetime_expr2) Returns datetime_expr2 − datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. 6. USE TIMESTAMPDIFF MySQL function. You can use ABS () on the results of some Date and Time Functions, such as DATEDIFF, or on the difference between two TO_SECONDS () calls. 2022/11/26. The function works in such a way that it checks how many literal months are completed from the start date to the end date. Result is expressed as a time value (and it has the limitations of the time. One expression may be a date and the other a datetime; a date value is treated as a datetime having the time part '00:00:00' where necessary. 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 () ). created, T0. MySQL: TIMESTAMPDIFF() condition having no effect. MYSQL: select SEC_TO_TIME(TIMESTAMPDIFF(SECOND,now(),'2019-02-16 16:00:00')) from dual Jooq has been used recently,but I don't know how to use SEC_TO_TIME with jooq please help me DSL. Share. `time` = timestampdiff (second,'2000-01-01 00:00:01',current_timestamp ()); END IF; END ; Share. MySQL AVG of TIMESTAMPDIFF function with WHERE CLAUSE. Follow. timestampdiff () requires valid dates for the second and third argument. 差分算出用の関数は大きく「timediff(時間用)」「datediff(日付用)」「timestampdiff(単位指定可能)」の3種類の関数が利用可能. `Start_Date`, b. I'm not sure this is a problem here. 7. We will be using the same employees table in order to demonstrate the intricacies of calculating the difference between two dates in terms of. Improve this answer. Improve this answer. Usually I'd just use 'TIMESTAMPDIFF ()' but this time I need to get the minutes from 9am until 22pm, of. walter. id WHERE. 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. numeric-expression. I want to convert the DATE_ADDED column to a time ago when I get the rows using SELECT * FROM Comments, I can do it using PHP language, But is it possible to do it directly by MySQL functions?. Subtracts the 2nd argument from the 3rd (date2 − date1). I am trying to run this query in phpmyadmin but it won't recognize the timestampdiff part. Returns the interval from datetime_expr2 to datetime_expr1. MySQL uses the TIMESTAMPDIFF function to calculate the difference between two dates or datetimes: SELECT TIMESTAMPDIFF(unit, startdate, enddate) FROM table_name; Where unit represents the unit of time, like YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, or SECOND. WHERE TIMESTAMPDIFF (month, vrdate, curdate ()) = 0. 0 to 11. This is the very lengthy MySQL Date and Time manual page. mysql. mysql query compare dates, DATEDIFF not working. Q&A for work. 目次. 이 외에도 차이를 연, 분기, 월, 주, 일, 시, 분, 초를 지정하여 가져올 때 사용하는 함수가 TIMESTAMPDIFF. timeDiff), MINUTE(x. The schema is SYSIBM. Syntax TIMEDIFF ( time1, time2) Parameter Values Technical Details Works in: From MySQL 4. Alternative for DATEDIFF. MySQL is quite different from SQLite. 0. end_date >= NOW (), but the longer expression cannot be optimized. datetime_expr1 and datetime_expr2 must be of the DATE or DATETIME type. You should extract the YEAR from curdate () and subtract that. end_date) <= 0 can be optimized by changing to to q. pi_id) AS num_picking_waiting_time, AVG(TIMESTAMPDIFF(SECOND, pi. TIMESTAMPDIFF() Return the difference of two datetime expressions, using the units specified TO_DAYS() Return the date argument converted to days TO_SECONDS() Return the date or datetime argument converted to seconds since Year 0 UNIX_TIMESTAMP() Return a Unix timestamp UTC_DATE() Return the current UTC date UTC_TIME() TIMESTAMPDIFF () is used in time series analysis to calculate the time intervals between data points. select dateDiff(current_timeStamp,dob) from sometable 'here dob is the table column1. calculating time between many dated in the same column with group by using MYSQL. Share. 12:25 occurred with 12 minutes and 25 seconds left, etc. SELECT TIMESTAMPDIFF(HOUR, UTC_TIMESTAMP(), NOW()); If the server's timezone is PST this will return -8. Cara penyelesaiannya juga sama. Viewed 356 times Part of PHP Collective 0 I'd like to display a time difference between two datetime and my current approach works, except that when the hours, minutes and seconds are under 10,. The function subtracts one datetime value from the other in the specified unit. It seems that two TIMESTAMPDIFF fucntion calls with same datetime expr parameters on `where` clause will return same result although they have different unit parameter. mysql> select curdate();-> '2008-06-13' mysql> select curdate() + 0;-> 20080613 current_date, current_date(). Devuelve un número estimado de intervalos del tipo definido por el primer argumento, basándose en la diferencia entre dos indicaciones de la hora. date_picked_begin,. If you want the result in hours you should use Timestampdiff. 0. Note that MySQL TIMESTAMPDIFF(month, date2, date1) function does not return exactly the same result, and you have to use an user-defined function if you need to fully emulate the Oracle MONTHS_BETWEEN function. It only returns the result in days. Note: If there are specified two arguments with this function, it first adds the second argument to the first, and then returns a datetime value. 21. You can use the DATEDIFF () function which will give you the difference in days. 2. How can i store the return value from the timestampdiff function. mysql没有一个单独的函数来完成此任务，但可以使用几种方法来实现目标。在这篇文章中，我们将讨论一些将日期转换为毫秒的方法。 阅读更多：mysql 教程 使用unix_timestamp()函数 unix_timestamp()是mysql中的一个函数，它将日期转换为unix时间戳。. Result is expressed as a time value (and it has the limitations of the time data. I don't think that you need to write your own timestampdiff function since oracle already has one: EXTRACT. It accepts two date values and returns the number of days between them. The query returns a negative number because TIMESTAMPDIFF returns a value in integer. 1. timestampdiff () requires valid dates for the second and third argument. +1 For keeping the query sargable and not wrapping the timestamp. I am not sure whether there is any inbuilt function for that or not, i think it can be done by applying simple mathematics. Improve this answer. datetime_expr1 and datetime_expr2 must be of the DATE or DATETIME type. but what about using timestampdiff. SELECT TIMESTAMPDIFF (<INTERVAL>,<timestampFrom>,<timestampTo>); If you want to find the difference between the first and the last timestamp of a given host ID, here you are: SELECT TIMESTAMPDIFF (MINUTE,MIN (pingtime),MAX (pingtime)) FROM yourTable WHERE host = 2; In addition to minute, you can use day as well. hoping you all are doing well, I'm working with MySql and using a TIMESTAMPDIFF function like this: TIMESTAMPDIFF (HOUR, 07:00:00, 16:30:00) and this return 9. SELECT PERIOD_DIFF('201205', '201206') as difference. You should take a look the TIMESTAMPDIFF function. numeric-expression. mysql> SELECT. TIMESTAMPDIFF(MINUTE,T. Subtracts the 2nd argument from the 3rd (date2 − date1). One of the dates is fetched from the database whereas the other is a LocalDate. The unit for the result (an integer) is given by the unit argument. May 2, 2022 at 13:19. The unit argument can be MICROSECOND, SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or YEAR. answered Feb 4, 2018 at 5:33. 0. The simplest way to do this is: DATE (CONCAT_WS ('-', year, month, day)) LPAD is not necessary as @pbarney pointed out earlier. 4) on a H2 database. 10 I am working on migrating functions from SQL Server 2000 to MySQL. Sorted by: 3. 3. 0. You can calculate the intervals with repeated calls of TIMESTAMPDIFF and TIMESTAMPADD:. unit – Denota la unidad para el resultado. start, c1. 1. 01. not sure what. IP IS NULL AND tracking. Conclusion. runTime,NOW()) > 20. `time` IS NULL) THEN SET NEW. In MySql the syntax of DATEDIFF is different: DATEDIFF (date1, date2) and returns the difference date1 - date2 in days. 其中，我们可以通过参数指定时间差的单位，如：秒、分钟、小时等。. On the other hand, if you want to build groups of consecutive records that have less than 1 minute gap in between, this is a gaps and islands problem. If start is greater than end the result is negative. MySQL TIMEDIFF () function. You are basically going to drive mysql crazy because of how the query gets evaluated. time1: The first TIME or DATETIME value. Once you strings are converted to dates, you can use timestampdiff(). Tutorial. MYSQL TIMESTAMPDIFF() gives wrong value. 2. Alternatively, you can use either of the functions TIMESTAMPDIFF() and UNIX_TIMESTAMP(), both of which return integers. (I'm using MySQL 5. As the previous example demonstrates, the TIMESTAMPDIFF () allows you to specify a unit for the results to be returned as (in fact, it requires you to specify the unit). If I am missing anything let me know. 5 hours). 0. As the previous example demonstrates, the TIMESTAMPDIFF () allows you to specify a unit for the results to be returned as (in fact, it requires you to specify the unit). That's already mapped in the most popular (and truly open source) EF Core provider, Pomelo. One year has 365 days. 7 Date and Time Functions. . TIMESTAMPDIFF () 函数将计算两个日期或日期时间表达式之间的整数时间差。. id = t. DATE_ADD, DATE_SUB, TIMESTAMPADD. arrival_time) >= 8 Share. TIMESTAMPDIFF(MINUTE, T0. 株式会社オズビジョンのユッコ (@terra_yucco) です。今日はトラブル対応中に出くわした MySQL の小ネタ。 トラブルの内容. Clearly it is paying attention to the offset, and in this situation, it is using it correctly. Follow answered Jun 6, 2018 at 14:34. *, timestampdiff (minute, start_time, end_time) as minutes from t;If the business would like to round each login_date value to its nearest 15 minute interval, we could use the following logics to achieve it. MySQL is a widely used relational database management system (RDBMS). Actually the data type for the columns is TIME, and this a sample of data stored: 07:11:40 07:11:56. Something like that : UPDATE table SET newcolumn = TIMESTAMPDIFF (HOUR,col1,col2); Something like that. 1. For SQLITE, the condition should be For SQLITE, the condition should be '(JulianDay(values. id = gc_sessions. status = 1 GROUP BY t. HTH. If you are experiencing this bug, a good alternative is to use TIMESTAMPDIFF and then get the sum of the column you create. 01. Alternatively, you can use TIMEDIFF (ts1, ts2) and then convert the time result to seconds with TIME_TO_SEC (). You can just subtract datetimes and it will return the value: select (now () - interval 2 day) - (now () - interval 5 day); The result isn't a datetime (it's some decimal coded date -- 3000000 for three days in this case), but it isn't correct to say consider a datetime and an interval as the same datatype. Sorted by: 1. Except for the day, they all calculate correctly. – axiacDATEDIFF (datepart, startdate, enddate) which can return the difference in years, months, days etc. birth_date FROMselect col1, avg (timestampdiff (SECOND, startTimestamp, endTimestamp)) as avgdiff from table group by col1. I have currently logged more than 900 hours of work this year though, and I want the result of my query to reflect this. Scenario : 1) User calls API from Lumen backend to insert data on a table. @Enrico - Not true. mysql> SELECT something FROM tbl_name-> WHERE DATE_SUB(CURDATE(),INTERVAL 30 DAY) <= date_col; The query also selects rows with dates that lie in the future. 2. This will provide you a whole number: SELECT TIMESTAMPDIFF (WEEK, date1, date2) AS weeks; To include a fraction for days, use: SELECT TIMESTAMPDIFF (DAY, date1, date2) / 7 AS weeks_days; or a fraction for seconds, use: SELECT TIMESTAMPDIFF (SECOND, date1, date2) / 604800 AS weeks_secs; as 604800 is 7 *. startTime, r. 0. Share. MySQL TIMEDIFF() Function MySQL Functions. start,c1. What this allows you to do is pass in two TIMESTAMP or DATETIME values (or even DATE as MySQL will auto-convert) as well as the unit of time you want to base your difference on. EDIT The example abovee works only on mysql databases. I need to get the number of days contained within a couple of dates on MySQL. Share. I have looked for answers to this problem through google and mysql documentation but I couldn't find anything. Change the unit time to second and then convert the diff second to time. But now i have migrated my data to Oracle. MICROSEGUNDO,. 0. Starting with your example query, something like this would probably work: SELECT foo FROM table t LEFT JOIN frequencies f USING (frequency_id) WHERE MOD ( (CASE WHEN f. 使用unix_timestamp()函数 TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2) Description. No matter how you input dates, every date function will treat these. Mysql TIMESTAMPDIFF function works like this. SELECT * FROM tableName WHERE now () - interval 10 minute < stored_timestamp. 0. mysql> SELECT something FROM tbl_name-> WHERE DATE_SUB(CURDATE(),INTERVAL 30 DAY) <= date_col; The query also selects rows with dates that lie in the future. mysql> SELECT something FROM tbl_name-> WHERE DATE_SUB(CURDATE(),INTERVAL 30 DAY) <= date_col; On the other hand, if you want to build groups of consecutive records that have less than 1 minute gap in between, this is a gaps and islands problem. You can concatenate the output of curdate() to a string containing the specific time you want to subtract from: select timestampdiff( MINUTE, your_column, concat( curdate(), ' 12:00:00' )) from your_table;If you want to diff an earlier start time against a later end time, then the former should appear before the latter in the call to TIMESTAMPDIFF. The basic syntax of the TIMESTAMPDIFF Function is as shown. Ask Question Asked 7 years, 1 month ago. Improve this answer. The unit for the result (an integer) is given by the unit argument. Note: By selecting the employees’ full names using the CONCAT() function, we can easily identify whose age we are looking at. elapse)/60 as diff from( SELECT c1. I'm using mysql to calculate turn around time, so what i'm doing is SET TAT = TIMESTAMPDIFF(HOURS, DATE1, DATE2). Sorted by: 4. If so, invert NOW() and sent_datetime in the expression. As one trivial example: 2016-02-16 22:00 to 2016-02-17 08:30 should return 150. 1. Sorted by: 18. TIMESTAMPDIFF( HOUR , now( ) , FROM_UNIXTIME( 1364814799 ) ) will return negative and positive values, if you need to use x>this_timestamp. MySQL では セクション11. 抽出ロジックにミスがあり、特定のアクションをしてから 60 分後までにはお知らせが飛ぶ予定だったのですが、それが一部の条件で飛ばなくなっていました。 Use timestampdiff() to get the time difference, and curdate() to get today's date. 下面说明了 TIMESTAMPDIFF 函数的语法。. SELECT TIMESTAMPDIFF(HOUR, UTC_TIMESTAMP(), NOW()); If the server's timezone is PST this will return -8. end) as elapse from c1) df MySQL 날짜 차이 가져오기 (DATEDIFF, TIMESTAMPDIFF 함수) 설명 MySQL에서 두 날짜간의 차이를 가져올 때 사용하는 함수가 두 가지가 있습니다. This is because id3 1 and id3 5 <= 2 days and id3 5 and id3 6 <= 2. user_id, b. The correct way of extracting miliseconds from a timestamp value on PostgreSQL accordingly to current documentation is: SELECT date_part ('milliseconds', current_timestamp); --OR SELECT EXTRACT (MILLISECONDS FROM current_timestamp); with returns: The seconds field, including fractional parts, multiplied. select ClientFirstName, ClientLastName, ClientDob, curdate (), YEAR (curdate ()) - ClientDob AS Age from Client; Note that storing ClientDob as just a YEAR means. SELECT TIMESTAMPDIFF (MONTH, '2012-05-05', '2012-06-04') -- Outputs. fin,NEW. SELECT TIMEDIFF (end_time,start_time) AS "total" FROM `metrics`; meaning 116 hours, 12 minutes and 10 seconds. 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. But when I try to save the output "TIMEDIFF" into a temporary table as Datatype Integer/datetime/time it saves as a different value. I am working on migrating functions from SQL Server 2000 to MySQL. SELECT datedifference (date1,. Functions that expect time values usually accept datetime values and ignore the date part. – AK47. The unit argument can be MICROSECOND, SECOND,. Use this link to know how to get accurate result using EXTRACT () and JULIAN_DAY () function. Then, to get the total picking time, use SUM():. start, c1. However, what I get is NULL, instead of the expected INT that represents seconds between two times. There are 2 things to check: Make sure you handle the case where sent_datetime is null, because otherwise TIMESTAMPDIFF will return NULL. It is to be noted that two expressions must be the same type. The following syntax works on MySQL 5. datediff语法：datediff (date1,date2)结果：返回 (date1-date2)的时间差. SQL query TIMESTAMPDIFF with php not working. scheduled_date_time) END as "Days Ahead", CASE WHEN slot. Sorted by: 0.