Since UNIX-timestamps are the number of seconds passed since 1970-01-01 00:00:00, you'd have to calculate using seconds. 6 Fractional Seconds in Time Values - MySQL 5. The Mysql SEC_TO_TIME function is used to create time values based on a given second. If you divide until day, you are fine (every single day every year has the same amount of seconds). +1 for to the point the stored timestamp is less than x minutes. 3. TIMESTAMPDIFF - How to use it in. A record is inserted for each print and contains the store ID and timeStamp. arrival_time) # returns seconds as integer. 6. MySQL には、年齢の計算や日付の一部の抽出など、日付の計算に使用できる関数がいくつか用意されています。. Use this link to know how to get accurate result using EXTRACT () and JULIAN_DAY () function. You probably want to use timestampdiff () select DriverName, CarType, min (timestampdiff (second, StartTime, EndTime)) as Best, max (timestampdiff (second, StartTime, EndTime)) as Worst from followingtable ft group by DriverName, CarType; If you want to show the value as a time format: select DriverName, CarType, date_format (cast. Conclusion. Solution is using select timestampdiff(DAY, '2016-04-13 11:00:01', '2016-04-14 11:00:00'); (note the opposite. MySQL TIMESTAMPDIFF() Function - The DATE, DATETIME and TIMESTAMP datatypes in MySQL are used to store the date, date and time, time stamp values respectively. It works if my beginning date is the first of january and the end date the 31st of December, but does not if it stars somewhere else during the year. You may convert operands to TIMESTAMP, substract (obtaining the difference in seconds) and convert to hours. 3. Learn more about TeamsMySQL TIMESTAMPDIFF() Function - The DATE, DATETIME and TIMESTAMP datatypes in MySQL are used to store the date, date and time, time stamp values respectively. After executing you can use it like this. In MySQL, the TIMESTAMPADD () function allows you to add a specified amount of time to a date or datetime value. *,cb_users. 1. Fortunately, MySQL provides a handy date function to make such calculations easy-breezy – say hello to the MySQL datediff function. SELECT SEC_TO_TIME. Share. 1. Your syntax is wrong, you must use this: SELECT id_user, action, TIMESTAMPDIFF ( SECOND, time, LEAD (time) OVER (PARTITION BY id_user ORDER BY time) ) AS timediff FROM table1. This function takes the difference between two dates and shows it in a date format yyyy-mm-dd. If your subtraction involves daylight savings change-overs, a particular. The unit for the result (an integer) is given by the unit argument. However, two of them only store part of a date: TIME stores the time, and YEAR stores the year. imei as imei, f. {fn TIMESTAMPDIFF (interval,startDate,endDate)} returns the difference between the starting and ending timestamps ( startDate minus endDate) for the specified date part interval (seconds, days, weeks, and so on). 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,. not sure what. timestampdiff () requires valid dates for the second and third argument. CONVERT(VARCHAR(10), CreatedDate, 108) returns a string with only time 15:19:53. Follow. thanks for your input. If you want the difference between just two times like '11:10:00' minus '10:20:00' then use select TIME_TO_SEC('11:10:00')-TIME_TO_SEC('10:20:00') Discussion: To calculate the difference between the timestamps in MySQL, use the TIMESTAMPDIFF (unit, start, end) function. 返回值. As you see, it expects the parameters to be of type. Months aren't an issue in this case since subtracting two timestamps just use days and seconds but 'days' can be a problem. As an entirely different approach, you could get the difference in seconds, and convert to TIME datatype. You can use the TIMESTAMPDIFF() function in MySQL. 7 Reference Manual :: 12. Sorted by: 18. DATE () Extract the date part of a date or datetime expression. You may have to swap the datetime values to get the right sign (positive/negative) on the result if the column is before/after "now". Date values are interpreted as DateTime with the time part set to 00:00:00 by default. Stack Overflow. 18. But if I put DAY OR MONTH it works I really can’t figure out what might be the . 0. sql. Use mysql's timestampdiff () function to calculate the difference and use from_unixtime () function to convert the timestamp into a datetime data type. PHP MySQL TIMESTAMPDIFF with seconds not working. Alternative for DATEDIFF. 3. The TIMESTAMPDIFF() function is truly a powerful tool in our SQL arsenal, enabling us to easily calculate differences between two timestamps. For example, if you wanted to calculate the difference between two timestamps in seconds, you would use the following query: SELECT TIMESTAMPDIFF (SECOND, start_timestamp. My database is mysql. If I understood him correctly, he wants to get the difference between these timestamps in seconds. 1. – Tim Biegeleisen. timestampdiff() 日付時間式から間隔を減算します to_days() 日に変換された日付引数を返します to_seconds() 0 年以降の秒数に変換された日付または日付時間引数を返します unix_timestamp() unix タイムスタンプを返します utc_date() 現在の utc 日付を返しますI'm giving input to TIMESTAMPDIFF(HOUR,'29-10-2012','19-11-2012') but I'm getting output as 504 but the value should be 510. You don't need to perform annotate or aggregate if you need difference for all the records. MySQL :: MySQL 5. MySQL Database: Restore Database. For a complete list of built-in date and time functions, check the Flink documentation. 0. The other legacy systems continued to log him in for several seconds and milliseconds (these are the false logins). 11. In MySQL, you would do something like this to get the time interval:. TIMESTAMPDIFF excludes the start date in its calculation. 1. Simple but elegant. Return the difference between two time expressions: SELECT TIMEDIFF("13:10:11", "13:10:10");The main misunderstanding in MySQL with timestamps is that MySQL by default both returns and stores timestamps without a fractional part. To get the corrected TIMESTAMPDIFF, I therefore multiply the number of Saturdays, Sundays and holidays by 24 to get the number of hours to be subtracted, then subtract that number from the TIMESTAMPDIFF. So we could modify the previous example so that TIMESTAMPDIFF. Installing these updates on an operating system lets the MySQL instances running there track the changes in time zone and daylight / standard time changeovers. The difference between each reading value is 300 seconds but this may vary slightly so i need to calculate the difference between each timestamp and then add the difference in readingvalue for that. Get your own SQL server SQL Statement: Edit the SQL Statement, and click "Run SQL" to see the result. 6 Fractional Seconds in Time Values - MySQL 5. This function takes three arguments: the unit of time you want to measure the difference in (e. See it on sqlfiddle. id = f. The value is expected to be the result of subtracting two timestamps and converting the result to CHAR. SQL query TIMESTAMPDIFF with php not working. 私の実行系では TO_SECONDS() と同じ結果が得られました; Conclusion. This is the syntax: select TIMEDIFF('2020/01/30 T00:00:00. You can use TIMESTAMPDIFF function for getting Approximate difference between two timestamps. From the msdn, it returns the count (signed integer) of the specified datepart boundaries crossed between the specified startdate and enddate. Goal. g. If I concat it with ' : '. I'll try using TIMESTAMPDIFF(seconds) and ssee if that fixes things. Here are the first 25 rows of. You can write your query like this: SELECT * FROM eventList WHERE date BETWEEN UNIX_TIMESTAMP ('2013/03/26') AND UNIX_TIMESTAMP ('2013/03/27 23:59:59'); When you don't specify the time, MySQL will assume 00:00:00 as the time for the given date. Calculating the difference in seconds of DateTime values: To calculate the difference, just change the argument MINUTE to SECOND. The null DATETIME columns cause the TIMESTAMPDIFF () function to return NULL. Functions that take temporal arguments accept values with fractional seconds. Method 2: Using the TIMESTAMPDIFF() Function. The following table summarizes the difference between these two functions: TIMEDIFF () TIMESTAMPDIFF () Requires 2 arguments. E_START_DATETIME_PST),. MySQL's TIMESTAMPDIFF () method is defined with the following syntax, accepting three required parameters: SELECT TIMESTAMPDIFF (unit, date_time_1, date_time_2); The parameters are: unit - The unit of the date and time measurement in seconds, minutes, hours, days, months, years, etc. 4. The value specifies the interval that is used. 1 why does mysql timediff function give wrong output? Load 7 more related questions Show. 0. I have a column where I log all time entries of any event. I have a table that contains a time column and I need to calculate its time duration by calculating the difference in seconds between current row time values and next row time values, and the last row would have 0 as timeduration in db2. An expression that returns a value that is a built-in SMALLINT or INTEGER data type. Alternatively, for the difference between dates in minutes, hours, days, weeks, months, or years – SELECT TIMESTAMPDIFF (UNIT, `DATE-A`, `DATE-B`) FROM `TABLE`. My SQL query is correct in answers alone but when it comes to the format it fails. MySQL MySQLi Database. This function takes three arguments: the unit of time you want to measure the difference in (e. Yes, because the timestamp handles the leap years. I tried this: SELECT DATE_SUB (NOW (), upload_date) FROM is_meeting_files. because the diff from 08/18 to 12/08 is 3 until the 12/17 it return 3 after it will return you 4. If you have a variable holding another UNIX_TIMESTAMP, you can get the difference and turn seconds to minutes (and round/truncate the result if needed): SELECT ROUND ( (UNIX_TIMESTAMP ()-1506947452) / 60, 0) Share. 6 Reference Manual. Since you're working with a known set of units, you could use a CASE statement to achieve this. I have been using the following query in MySQL workbench to calculate days between dates for individual id's. select(sum(df. DATEDIFF() seconds with millisecond to float or decimal. In applications that involve event scheduling, DATE_ADD () helps determine future event dates based on specified intervals. elapse)/60 as diff from( SELECT c1. start, c1. user_id, b. sql console application and it supposed to show it as requested. DATE () Extract the date part of a date or datetime expression. Since you're working with a known set of units, you could use a CASE statement to achieve this. +1 For keeping the query sargable and not wrapping the timestamp column within a function for comparison. And when specifying second instead of microsecond it. Oracle also dont support NOW() function in mysql. . SELECT. You may use TIMESTAMPDIFF as the answer below shows, but you should avoid storing your timestamps as strings in the database. I have tried to used timestampdiff, but it takes three arguments. 日期和时间函数. 3. EDIT The example abovee works only on mysql databases. ^^^ You are performing a UNION between two tables, and in the first half of the union you have the sum of integers for the diff column while in the second half you have a string. About;. g. Here’s an example that returns the difference in minutes. This function calculates the difference between two datetimes in a specified unit (such as seconds, minutes, hours, days, etc. SELECT * FROM messages WHERE time > UNIX_TIMESTAMP (NOW ()) - 604800. What is interval. 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. The difference is 25 (hours). Share. name, f. 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. Here, First, we are finding the. For example the result must be something like 45:15:10 which means 45 hours 15 min 10 sec, or 30:07 for 30 min 07 sec. TIMESTAMPDIFF ( numeric-expression string-expression. One expression may be a date and the other a datetime. edited Aug 21, 2018 at 17:38. Because the number 21 matches with the %d specifier, the function takes 21 as the day value. "timestamp" is a column in MYSQL which I hold a timstamp as such "1365793346". threads-1)) SECOND)) <= 0 is quite confusing without. 4 Answers. 01 sec) Share. 58 and found no overflow with timestamps differing by up to at least 10000 years. SELECT * FROM table WHERE TIMESTAMPDIFF (MINUTE,timestamp,NOW ()) AS thisisit. SELECT timestampdiff (minute,created_at,now ()) AS TIMEDIFF. SELECT current_timestamp() => 2018-01-18 12:05:34 which can be converted to seconds timestamp as. If you are experiencing this bug, a good alternative is to use TIMESTAMPDIFF and then get the sum of the column you create. At least these are real and true seconds, unlike the MySQL DATEDIFF where they are. This implies that the difference between times should not be more then 30 seconds. I ran all three examples with BENCHMARK with valid and invalid dates. 6. The value returned is an INTEGER, the number of these intervals between the two timestamps. The date is in CURRENT TIME STAMP format, just to clear that up. MySQL TIMEDIFF () returns the differences between two time or datetime expressions. 3. 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. when MySQL stores a value into a column of any temporal data type, it discards any fractional part and does not store it. Reading time: 2 minutes. Alternatively, for the difference between dates in minutes, hours, days, weeks, months, or years – SELECT TIMESTAMPDIFF (UNIT, `DATE-A`, `DATE-B`) FROM `TABLE`. TIMESTAMPDIFF (unit,datetime_expr1,datetime_expr2) where unit argument, which should be one of the following values: MICROSECOND (microseconds), SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or YEAR. The SEC_TO_TIME () function converts numeric seconds into a time value (in format HH:MM:SS). DATEADD in Aurora MySQL only adds full days to a datetime value. both YEAR and YEARS are valid). *, timestampdiff (minute, start_time, end_time) as minutes from t;DATEDIFF() TIMESTAMPDIFF() 2つの引数を必要とする。 引数が3つ必要です。 第1引数から第2引数を引く（expr1 – expr2）。 第3引数から第2引数を引く（expr2 – expr1）。There are two columns ( t0 and t1) whose types are timestamp ( t0 = 2021-11-18 20:25:09 and t1 = 2021-11-18 20:36:41) I want to find t1 - t0 (expecting ~11 minutes or ~ 700seconds), but the result is 1132. 3. @Enrico - Not true. 0 to 11. Example 1 – Basic Difference Here’s an example that demonstrates the basic difference between these functions. MySQL convert timediff output to day, hour, minute, second format Ask Question Asked 12 years, 8 months ago Modified 4 years, 2 months ago Viewed 59k. 0. One expression may be a date and the other a datetime; a date. The minute and second functions do not return the time as minutes or seconds. Description. Here’s an example: SELECT TIMESTAMPDIFF(unit, datetime1, datetime2) AS difference FROM your_table;Caused by: java. It effectively calculates the difference in seconds and divides (discarding the fractional part) by the number of seconds in the chosen unit. 1 Answer. COALESCE (TIMESTAMPDIFF (SECOND,time_in1,time_out1),0) + COALESCE (TIMESTAMPDIFF (SECOND,time_in2, time_out2),0) This works if you want to use zero. 0. Recommended MySQL Tutorials. my approach : set unit as SECOND and then use SEC_TO_TIME. 4, the instances are limited in which a fractional seconds part is permitted in temporal values. 1. Seconds, Minutes, Hours, Days, Weeks,. . returns a Unix timestamp in seconds since '1970- 01-01 00:00:00' UTC as an unsigned integer if no arguments are passed with UNIT_TIMESTAMP(). EntityFrameworkCore 6. Feb 4, 2020 at 8:19. 2. TIMESTAMPDIFF. Sorted by: 4. Here, you have learned how to use MySQL TIMESTAMPDIFF() function with various examples. I'm writing an SQL file and giving it to mysql < . For example, if we want to know the difference between two dates in seconds: SELECT id, job, TIMESTAMPDIFF(SECOND, start_date, end_date) AS runtime FROM example_table; This calculates end_date - start_date in seconds. answered Feb 4, 2018 at 5:33. One year has 365 days. DATE_FORMAT () Format date as specified. 3. Select TIMESTAMPDIFF (SECOND, TIME (a. timeDiff) FROM ( SELECT Sec_to_time(Avg (Timestampdiff (second,. 1. time_zone = 'SYSTEM', @@system_time_zone, @@session. TimeStamp2, t2. ). Example of the possible combinations below: Interval. I have tried the following query but it only returns the difference in seconds from the first row. TIMESTAMPDIFF() : This function in MySQL is used to return a value after subtracting a DateTime expression from another. If start is greater than end the result is negative. Updating could be done via ajax requests (probably bad idea when using multiple timestamps) or via manually incrementing the given time. In the above syntax, the expr is used to determine the interval value, and. 0] Information in this document applies to any platform. Subtracts the 2nd argument from the 1st (date1 − date2). 3 Answers. If you want to read about CONVERT () and CAST () here is the link. Connect and share knowledge within a single location that is structured and easy to search. select SEC_TO_TIME (sum (diff)) as result from ( select timestampdiff (second,min (case when log_tpe='start_break' then timestamps end) , min (case when log_tpe='end_break' then timestamps end)) as diff from t group by date (timestamps),hour (timestamps) )A. The following query selects all rows with a date_col value from within the last 30 days: . SELECT TIMESTAMPDIFF(SECOND, NOW(), UTC_TIMESTAMP()); Add the result of the above to any unix timestamp if you want to compare it to MySQL DateTimes. Here's the sql:. Using TIMESTAMPDIFF : NOTE:- Following Assumptions are made for TIMESTAMPDIFF () function. The function counts whole elapsed units based on UTC with a DAY being 86400 seconds. MySQL中两个Timestamp之间的秒差 在MySQL中，可以使用TIMESTAMPDIFF函数来计算两个Timestamp之间相差的秒数。 SELECT TIMESTAMPDIFF(SECOND,'2021-09-01 10:00:00', '2021-09-01 10:01:30') as total_seconds; 上述语句的执行结果为90，即两个Timestamp相差90秒。1901 to 2155. Павел П. you can use mysql funcion timestampdiff like below. DATE_ADD, DATE_SUB, TIMESTAMPADD. To get the difference in seconds as we have done here, choose SECOND . If you only want to know the difference of time in seconds, you can use MySQLs TIMESTAMPDIFF() for that. To calculate the difference between two date/datetime expressions, use 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. end_date - INTERVAL (q. jstu. 86 sec) Insert some records in the table using insert command −. 59) %s: Seconds (00. This allows you to see the hours, minutes, seconds, etc. By default, MySQL TIME fields allow a time range of '-838:59:59' to '838:59:59'. Default: 10; Maximum idle connections: The total number of connections allowed to be idle at a given time. montant_annuel = NEW. 5 hours). birth)) / 365. Syntax : DATEDIFF ( datepart , startdate , enddate ) You should use TIMEDIFF() or TIMESTAMPDIFF() function. Tham số unit được sử dụng để định nghĩa đơn vị của giá trị được trả về. INTERVAL allows either YEAR and MONTH to be mixed together or DAY, HOUR, MINUTE and SECOND. Its arguments are the unit in which you want the result expressed, and the two dates for. mysql timediff no proper output when endtime is 24hrs. slaakso. I am using the DATEDIFF function to calculate the difference between my two timestamps. answered Feb 4, 2018 at 5:33. ) and got 10:25:30 - 10:15:25 = 5 seconds. SELECT * FROM tableName WHERE TIMESTAMPDIFF (MINUTE,timestamp,NOW ()) < 10. mysql 날짜 차이 가져오기 (datediff, timestampdiff 함수) 설명 mysql에서 두 날짜간의 차이를 가져올 때 사용하는 함수가 두 가지가 있습니다. How to convert second to formatted date time in mysql? I have a query to get date difference in second. d H:i:s"). You can use the DATE () function to extract the date portion of the timestamp: SELECT * FROM table WHERE DATE (timestamp) = '2012-05-25'. timestampdiff. TIMESTAMPDIFF not working on mysql query in codeigniter. Instead, the result is 838:59:59, which makes sense because that is the limit. that you wish to see in the format you want. time_zone) # This will give you time zone if system timezone is different from global timezone. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. UPDATE `table` SET end_dt = DATE_ADD(end_dt, INTERVAL (15 - TIMESTAMPDIFF(SECOND, NOW(), end_dt)) SECOND) WHERE DATE_SUB(end_dt, INTERVAL 15 second) <=. minutes = total_seconds DIV 60. Connect and share knowledge within a single location that is structured and easy to search. TIMESTAMPDIFF() : Esta función en MySQL se usa para devolver un valor después de restar una expresión DateTime de otra. Here’s a quick rundown of the functions you can use in MySQL: ## #TIMESTAMPDIFF TIMESTAMPDIFF() returns the difference in the given unit. You could use the microsecond unit and divide by 1000 - MySQL doesn't appear to support milliseconds. So the TIMESTAMPDIFF(MINUTE. TimeStamp1, t1. An expression that returns a value of built-in CHAR or VARCHAR data type. username, cb_users. 0. I am using below code for today and database date. début)/365) Here is my table and the result in the 'montant_annuel' column:MySQL Examples MySQL Examples MySQL Editor MySQL Quiz MySQL Exercises MySQL Certificate. In order to convert days to a date, so you can get the number of years etc you need to use from_days(); from_days() doesn't really work before 1582, to quote from the documentation: "Use FROM_DAYS(). A BIGINT. 21. The unit for the interval as mentioned should be one of the following : FRAC_SECOND (microseconds), SECOND, MINUTE, HOUR, DAY, WEEK,. 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. transaction_pk and tsub. The unit for the result (an integer) is given by the unit argument. The TIMESTAMPDIFF () function will then return the difference in the unit specified. I made this: select strftime('%s','2012-01-01 12:00:00') - strftime('%s','2004-01-01 02:34:56') but this is just. Param1, t2. The schema is SYSIBM. MySQL only supports microsecond for a higher resolution, but you can achieve it by converting microsecond to millisecond manually: SELECT TIMESTAMPDIFF (MICROSECOND, now (3), updated_at) / 1000 AS diff_in_ms FROM events; Share. payment_time = 2021-10-29 07:06:32. Actually the data type for the columns is TIME, and this a sample of data stored: 07:11:40 07:11:56. 6. . 21. The MySQL TIMESTAMPDIFF () function is used to find the difference between two date or DateTime expressions. If this mode is enabled at the time that a table is created, TIMESTAMP columns are created as DATETIME columns. Have tried this but only gives me the difference of the date part:I am using timestampdiff in derby db to retrieve the time difference between 2 time: startdate, and enddate. 日付の「比較」「加算」「差分」「抽出」など利用例を交えて解説します。. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. Here expr2 is greater than expr1, so the return value is positive. Fractional seconds for TIME , DATETIME, and TIMESTAMP values are supported, with up to microsecond precision. 0. Sorted by: 3. They are: Unit type, datetime expressions, and datetime expression2. Just. Teams. Another solution I found was using the MySQL timestampdiff method, still too generic, but I wouldn't have to worry about possible Time-Zone differences. UNIX_TIMESTAMP is seconds seconds since '1970-01-01 00:00:00' in UTC. 1 Answer. 5 日付の計算. I have seen this answer but it converts datetime into seconds and return time only, I want date as well. . The query also selects rows with dates that lie in the future. , begin is a DATE value and end is a DATETIME value. The argument order and syntax is also different. Note: You need to pass two date / datetime values along with the unit (eg, day, month, etc. You can then use SEC_TO_TIME (seconds) to get the format hh:mm:ss, and take the right 5 characters if you really need hh:mm. In MariaDB, you can use TIMESTAMPDIFF function. Noting Ollie Jones warning, I've tested TIMESTAMPDIFF on MySQL version 5. MySQL SUBTIME () subtracts one datetime value from another. To avoid having to repeat yourself, you can wrap the calculation: SELECT HOUR(x. I take it that you are using MySQL. SEC_TO_TIME(MOD(TIMESTAMPDIFF(SECOND,start_time,end_time),24*60*60)) The hour portion could still be less than two digits, so you could apply the same pattern as. I currently developed a cron that runs every 1 minute to analyze the last 60 seconds of the bot records in database, I need to group the conversation ID's that have more than 3 records within 60 seconds in the same url and client_session_id. Below is a practical illustration of this method:In this method, we create a custom function ConvertSecondsToUnits that takes the number of seconds and the desired unit ('days', 'weeks', or 'months') as parameters. TIMESTAMPDIFF(unit, timepoint1, timepoint2): returns the number of time units (SECOND, MINUTE, HOUR, DAY, MONTH or YEAR) between timepoint1 and timepoint2 . SELECT TIMESTAMPDIFF(HOUR, UTC_TIMESTAMP(), NOW()); If the server's timezone is PST this will return -8. If you wanted to avoid SEC_TO_TIME (seconds), you can build up the string yourself. Aurora MySQL also supports DATE_SUB for subtracting date parts from a date time expression. seconds, minutes, hours, etc. +1 For keeping the query sargable and not wrapping the timestamp. The output is 510 because start value is 29/10/2012 05:13. Description. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. Teams. calculate time diffrence in mysql by seconds. A datetime expression. select t.