Now if. MySQL. 0. How can i store the return value from the timestampdiff function. Example 1 – Basic Difference Here’s an example that demonstrates the basic difference between these functions. session_id =. The TIMESTAMPDIFF function returns the. 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. I had a following part of SELECT query calculating different between the UTC timestamp in rcv. rtcdatetime field and current UTC: TIMESTAMPDIFF (SECOND, rcv. TIMESTAMPDIFF. Here is an example that uses date functions. SELECT SUM(Seconds_In_State) From (SELECT Time_Stamp, MState, (-1 * TIMESTAMPDIFF(Minute, LEAD(Time_Stamp) OVER(ORDER BY Time_Stamp), Time_Stamp)) AS Seconds_In_State FROM Mstate WHERE. 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 value returned is an. 25 < ?'I'm trying to add seconds to a date based on certain events that occur. 6. MySQL 常常会接受格式不正确的日期和时间值。. Jan 18, 2022 at 12:05. The TIMESTAMPDIFF() function is truly a powerful tool in our SQL arsenal, enabling us to easily calculate differences between two timestamps. 097332 trigger_time = 2021-10-10 14:11:13. The function supports units of years, quarters, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds. SELECT FROM_UNIXTIME (epoch timestamp, optional output format) The default output is YYYY-MM-DD HH:MM:SS. Q&A for work. Practice. TIMESTAMPDIFF method only works with datetime format. 433325 and user 0 legitimately logged in again at 2021-09-03 20:03:35. TIMESTAMPDIFF() subtracts the dates it receives as arguments and it looks like it. Follow answered. TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2) Returns datetime_expr2 – datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. 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. values('id', 'diff_time')MySQL TIMESTAMPDIFF() function explained. TIMESTAMPDIFF(unit, timepoint1, timepoint2): returns the number of time units (SECOND, MINUTE, HOUR, DAY, MONTH or YEAR) between timepoint1 and timepoint2 . Then it adds the number of the full days to the starting time and reduces the closing time my the sum, so what remains is the time in the current day. user_id, b. So maybe this problem has. MySql version >=5. If you are experiencing this bug, a good alternative is to use TIMESTAMPDIFF and then get the sum of the column you create. Use timestampdiff() to get the time difference, and curdate() to get today's date. NET Standard or . 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(). The. Getting minute difference between two timestamps in mysql using TIMESTAMPDIFF. TIMESTAMPDIFF ( numeric-expression string-expression. An expression that returns a value that is a built-in SMALLINT or INTEGER data type. 59) %T: Time, 24-hour (hh:mm:ss) %U: Week (00. select t. COALESCE (TIMESTAMPDIFF (SECOND,time_in1,time_out1),0) + COALESCE (TIMESTAMPDIFF (SECOND,time_in2, time_out2),0) This works if you want to use zero. If TIMESTAMPDIFF () returns NULL, we can find rough age by subtracting the current year from the year of birth. Here is the problem with your query: SELECT id, booked_date, "diff",. 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. If the second date or time is earlier than the first date or time, the result is negative. The function subtracts one datetime value from the other in the specified unit. The unit argument can be MICROSECOND , SECOND , MINUTE , HOUR , DAY , WEEK , MONTH , QUARTER , or YEAR . One expression may be a date and the other a datetime. The unit value may be specified using one of keywords as shown,. select count (session_id), client_session_id. Conclusion: In this blog, we explored several strategies to convert seconds to days,. I have a table that contains among other things an id a time in the format date:time (YYYYhhmmss) and a readingvalue. "timestamp" is a column in MYSQL which I hold a timstamp as such "1365793346". timestamp off by minutes. The other legacy systems continued to log him in for several seconds and milliseconds (these are the false logins). ; Second, because the comma (,). I am using below code for today and database date. Tham số unit được sử dụng để định nghĩa đơn vị của giá trị được trả về. user where createddate >= '2019-09-01' and createddate <= '2019-09-30'. You specify the unit to add, as well as how many of that unit to add. To calculate the difference between two dates in seconds, we can make use of this function along with the UNIX_TIMESTAMP function. The avg function works like any other aggregate function, and will respond to group by. id = f. The above works as expected. 4, the instances are limited in which a fractional seconds part is permitted in temporal values. timestampdiff Description. I tried this: SELECT DATE_SUB (NOW (), upload_date) FROM is_meeting_files. This is the query I am working on right [email protected], NOW()). 1 why does mysql timediff function give wrong output? Load 7 more related questions Show. 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. In Sybase ASE you can use DATEDIFF function to get the difference between two datetime. select id, CAST (datediff (curdate (),birth_date) / 365 as int) from student. Apr 4, 2018 at 6:36. SELECT TIMESTAMPDIFF. DATE_SUB () Subtract a time value (interval) from a date. There are five data types in MySQL. 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". The unit for the integer result and the interval should be one of the following: SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, or YEAR. Let us walk through them quickly: To calculate the difference between dates in days – SELECT DATEDIFF (`DATE-A`, `DATE-B`) FROM `TABLE`. By default, MySQL TIME fields allow a time range of '-838:59:59' to '838:59:59'. I have a table in which I am trying to sum times on the same column. For a complete list of built-in date and time functions, check the Flink documentation. I am using below code for today and database date. I made this: select strftime('%s','2012-01-01 12:00:00') - strftime('%s','2004-01-01 02:34:56') but this is just. Result is expressed as a time value (and it has the limitations of the time. This method returns the difference between two dates formatted as hours:minutes:seconds. . Here is an example that uses date functions. 1 Answer. I want to make a function call that hase efect in SQLite like TIMEDIFF in MySQL. EXTRACT. TIMESTAMPDIFF not working on mysql query in codeigniter. 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. 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. Mysql TIMESTAMPDIFF for time datatype return negative value. 1. DayToSecond. 3 Answers. It returns an integer as a result. The format of a TIMESTAMP is YYYY-MM-DD HH:MM:SS which is fixed at 19 characters. Share. An expression that returns a value of built-in CHAR or VARCHAR data type. To get the difference in seconds as we have done here, choose SECOND . In his requirements, the start time is in the past, but the result is a positive time difference. 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. So you need to conditionalize those values with COALESCE (value, default). Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. . TIMESTAMPDIFF in a php foreach-loop. The function returns an INTEGER value representing the number of intervals between the two timestamps. 3. . To understand the MySQL convert timediff output to day, hour, minute, and second format, you need to use CONCAT () from MySQL. DATE_ADD () Add time values (intervals) to a date value. 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. g. Example 3 – A ‘datetime’ Example. The timestamp difference returns the difference between two dates in seconds. Net write timeout (in seconds): Seconds to wait for data from the server before aborting the connection. Add a comment. If startdate and enddate are both assigned only a time value, and the datepart is not a time datepart, DATEDIFF returns 0. 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 *. 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. 6. , begin is a DATE value and end is a DATETIME value. use TIMESTAMPDIFF. A datetime expression. e . sql. time_start) / 60 as diff_minutes. Share. I need to produce a recordset that gives me the time between prints in seconds. 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. 6. id AND r. username, cb_users. Because the number 21 matches with the %d specifier, the function takes 21 as the day value. TimeStamp2))<=4 WHERE. 0. It only returns the result in days. answered Aug 21, 2018 at 15:15. 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. rtcdatetime, UTC_TIMESTAMP ()) AS utcdiff. For SQLITE, the condition should be For SQLITE, the condition should be '(JulianDay(values. Where a time stamp is a numerical value representing the number of milliseconds from '1970-01-01 00:00:01' UTC (epoch) to the specified time. Since you're working with a known set of units, you could use a CASE statement to achieve this. Look at the documentation for TIMESTAMPDIFF () TIMESTAMPDIFF (unit,datetime_expr1,datetime_expr2) Returns datetime_expr2 − datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. The unit for the result (an integer) is given by the unit argument. 1. TIMESTAMPDIFF giving unexpected result. You don't need to perform annotate or aggregate if you need difference for all the records. The query also selects rows with dates that lie in the future. To determine how many years old each of your pets is, use the TIMESTAMPDIFF () function. If this mode is enabled at the time that a table is created, TIMESTAMP columns are created as DATETIME columns. g. 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. . Here is an example that uses date functions. 1. It is mainly used to calculate the date and time values. TIMESTAMPDIFF is from mysql db. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. About;. Elasticsearch SQL accepts also the plural for each time unit (e. On the other hand, if. 212k 129 690 1515. So your query MUST BE next: SELECT *. TIMESTAMPDIFF method only works with datetime format. A date value is treated as a datetime with a default time part '00:00:00'. date_or_time_part must be one of the values listed in Supported Date. 11. DATEDIFF() seconds with millisecond to float or decimal. 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. 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. when MySQL stores a value into a column of any temporal data type, it discards any fractional part and does not store it. 6 Answers. 0 datediff() not ignoring time. ). 6 Reference Manual. It will return the difference in terms of an INTERVAL DAY TO SECOND type: org. Syntax : TIMESTAMPDIFF (unit,expr1,expr2). Calculates the difference between two date, time, or timestamp expressions based on the specified date or time part. answered Oct 2, 2017 at. ). 2022/11/26. This function takes three arguments: the unit of time you want to measure the difference in (e. The TIMESTAMPDIFF function allows its arguments to have mixed types e. Aarthy. MySQL Date Functions. I would recommend to choose that unit. maxDt)) AS Duration FROM (SELECT DATE(i. Share. So I used TIMESTAMPDIFF in seconds. So you need to. timestampdiff () requires valid dates for the second and third argument. It is a bad idea to use some operations on the index field. In MySQL, how would I get a timestamp from, say 30 days ago? Something like: select now() - 30 The result should return a timestamp. SELECT * FROM table WHERE TIMESTAMPDIFF (MINUTE,timestamp,NOW ()) AS thisisit. INTERVAL allows either YEAR and MONTH to be mixed together or DAY, HOUR, MINUTE and SECOND. . my approach : set unit as SECOND and then use SEC_TO_TIME. The function requires a unit of time value that you want to retrieve and two datetime expressions. MySQL the TIMESTAMPDIFF() returns a value after subtracting a datetime expression from another. 日期和时间函数. TIMEDIFF () is essential for time-based analysis by enabling you to measure the duration of events or actions. And it should include hours, minutes etc means it must be the full difference like 10:25:30 - 10:15:25 = 605 seconds. 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. TIMESTAMPDIFF() : This function in MySQL is used to return a value after subtracting a DateTime expression from another. They are: Unit type, datetime expressions, and datetime expression2. Even if you pass the current date/time or another specified date/time, the function will return a Unix timestamp based on that. If the value returned from TIMEDIFF () is greater than 5 minutes, the record it represents will be returned. status_timestamp < tmain. 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。. TIMESTAMPDIFF is from mysql db. MySQL Database: Restore Database. id) FROM responses r LEFT JOIN participants p ON r. It returns an integer as a result. Note that TIMESTAMPDIFF. 0] Information in this document applies to any platform. 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. Yes, because the timestamp handles the leap years. timestampdiff() 语法 这是 mysql timestampdiff() 函数的语法：I want to update the datetime round to 15 minutes in a MYSQL database table. transaction_pk and tsub. 2. SELECT TIMESTAMPDIFF(MINUTE,'2022-02-01 10:30:27','2022-02-01 10:45:27') AS 'Difference in Minutes'; Result: +-----+ | Difference in Minutes | +-----+ | 15 |. 0. 0. Since the question is being tagged for mysql, I have the following implementation that works for me and I hope similar alternatives would be there for other RDBMS's. You need to use the function available in your db in the below queryset. 0. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. 1. 4 Answers. timestamp 型のカラムを利用して日付の差分を取得したい場合は、そのまま減算しちゃダメ。 MySQL には各種日付用の関数があるので、適切なものを使いましょう。 3 Answers. – Mehran. Functions that take temporal arguments accept values with. 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. 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 the value is not a CHAR or VARCHAR data type, it is implicitly cast to VARCHAR before evaluating the function. Share. that you wish to see in the format you want. SQL Server : -- Get difference in days SELECT DATEDIFF ( dd, '2022-09-01', '2022-09-05'); # 4. And when specifying second instead of microsecond it. 6 timestampdiff problem with return result. so actually you are doing. 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. Description. . If you wanted to avoid SEC_TO_TIME (seconds), you can build up the string yourself. Please follow up in a Java newsgroup. 1. walter. I ran all three examples with BENCHMARK with valid and invalid dates. PHP MySQL TIMESTAMPDIFF with seconds not working. TIMESTAMPDIFF( HOUR , now( ) , FROM_UNIXTIME( 1364814799 ) ) will return negative and positive values, if you need to use x>this_timestamp. Here is my trigger: SET NEW. The following query selects all rows with a date_col value from within the last 30 days: . Most of the date/time functions in. 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. But the output I get is 1 (day). 0. MySQL timestampdiff() 函数就比 datediff() 功能强多了，datediff() 只能计算两个日期（date）之间相差的天数。Adds the integer expression interval to the date or datetime expression datetime_expr. The functions in this section use a format string that is compatible with the MySQL date_parse and str_to_date functions. The function uses conditional statements to perform the appropriate conversion. You can use the MySQL HOUR(), MINUTE() and SECOND() functions to break the time returned from SEC_TO_TIME into its components. timestamp,f. `time_column. +1 For keeping the query sargable and not wrapping the timestamp column within a function for comparison. SECONDS is not a valid unit. Syntax. Hot Network Questions Job offer doesn't smell quite right - is this a scam?. start,c1. If your subtraction involves daylight savings change-overs, a particular. According to the documentation, the first argument can be any of the following: MICROSECOND SECOND MINUTE HOUR DAY WEEK MONTH QUARTER YEAR 2 Answers. If you have a number of milliseconds since the Unix epoch, try this to get a DATETIME (3) value. 0 to 11. DATE_ADD () Add time values (intervals) to a date value. time_zone = 'SYSTEM', @@system_time_zone, @@session. speed as speed FROM stops f, stops f2 where f2. The following is the query to calculate the difference between two timestamps. Installing these updates on an operating system lets the MySQL instances running there track the changes in time zone and daylight / standard time changeovers. 0 TIMESTAMPDIFF giving unexpected result. 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. It is not necessary that both the expression are of the same type. Usage and definition for TIMESTAMPDIFF function (Doc ID 2756136. createDate) minDt, max(i. 5 日付の計算. I am migration mysql to Postgres Runing this bellow query on both Mysql and Postgres SELECT cb_sessions. My SQL query is correct in answers alone but when it comes to the format it fails. Immutable if start and end dates are TIMESTAMP; Stable if start and end dates are TIMESTAMPTZ; SyntaxFor MySQL The TIMESTAMPDIFF is the native MySQL function which returns the difference between two given timestamps (one timestamp is subtracted from the other) for the specified date part interval (seconds, days, weeks, etc. TiDB 支持使用 MySQL 5. Before MySQL 5. CREATE TABLE `contract` ( `id` int (11) NOT NULL AUTO_INCREMENT, `emp_id` int (11) DEFAULT NULL , `sign_time` datetime DEFAULT NULL , `end_time` datetime DEFAULT NULL , PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 ; CREATE TABLE. MySQL DATEDIFF: Calculate Days Between Two Dates. The TIMESTAMP () function returns a datetime value based on a date or datetime value. timeDiff) FROM ( SELECT Sec_to_time(Avg (Timestampdiff (second,. 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. PHP MySQL TIMESTAMPDIFF with seconds not working. . Instead, the result is 838:59:59, which makes sense because that is the limit. I want to find out how many second have been elapsed since a date from Mysql entry which was inserted with NOW() and the current date in the format date("Y. MySQL TIMESTAMPDIFF() Function - The DATE, DATETIME and TIMESTAMP datatypes in MySQL are used to store the date, date and time, time stamp values respectively. A value of 0 signifies that there. 例如， '2020-01-01 01:01:01' 和 '2020-01_01 01:01' 被视为有效的日期和时间值。. SELECT * FROM messages WHERE time > UNIX_TIMESTAMP (NOW ()) - 604800. So, to get results that we need we can calculate the TIMESTAMPDIFF between some anchor datetime and CreatedDate and UpdatedDate instead of calculating the difference between CreatedDate and UpdatedDate. Sorted by: 2. PHP MySQL TIMESTAMPDIFF with seconds not working. 返回：end - begin 的时间差，并以 unit 指定的单位进行输出。. ). MySQL TIMESTAMPDIFF function Example. So i want to use the same query to get the TIMESTAMPDIFF in a table in Oracle. So, to get results that we need we can calculate the TIMESTAMPDIFF between some anchor datetime and CreatedDate and UpdatedDate instead of calculating the difference between CreatedDate and. UNIX_TIMESTAMP is seconds seconds since '1970-01-01 00:00:00' in UTC. I have my SQL statement like this trying to get the difference in 2 timestamps greater than 10 minutes. Below. 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. The latter is longer, but in terms of cpu time should be faster. The MySQL TIMESTAMPDIFF () function is used to find the difference between two date or DateTime expressions. Since UNIX-timestamps are the number of seconds passed since 1970-01-01 00:00:00, you'd have to calculate using seconds. 6. One solution you could use is extra in django queryset. now () - a. An unit, as described in the description. Select INSERT UPDATE DELETE Query in MySQL. The schema is SYSIBM. TimeStamp1, t1. – Tim Biegeleisen. One expression may be a date and the other a datetime. seconds, minutes, hours, etc. In this case, we compare two datetime values (as opposed to just the date values as in the previous examples). One expression may be a date and the other a datetime; a date. 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. The MySQL TIMESTAMPDIFF () function is used to find the difference between two date or DateTime expressions. In MariaDB, you can use TIMESTAMPDIFF function. 1. . select(sum(df. Follow. SUBTIME () is valuable for making precise adjustments to time values, such as subtracting seconds, minutes, or hours. If the business would like to round up each login_datetime value to 15 minute interval, we can apply the following logics. g. So now my question: I thought apache drill replaces the function "TIMSTAMPDIFF" at runtime. Your query string would look like this:Your problem is that TIMESTAMPDIFF effectively first truncates the values to the indicated precision (e. Note: time1 and time2 should be in the same format, and the. Share. To avoid having to repeat yourself, you can wrap the calculation: SELECT HOUR(x. The latter is longer, but in terms of cpu time should be faster. Default: 60; Record fetch size: Number of records to fetch at once. Updating could be done via ajax requests (probably bad idea when using multiple timestamps) or via manually incrementing the given time. 12:25 occurred with 12 minutes and 25 seconds left, etc. The result returned by TIMEDIFF() is limited to the range allowed for TIME values. Below would correct the most popular answer to return hours as an integer and minutes as a decimal (ie 6. Is there any way around this so the result of the query can go. Hi I tried the following: timediff(`date2`, `date1`) which gives me the time difference but if the days are different it does not account for the day difference. mysql. I am trying to convert plain MySQL query to Doctrine query builder in Symfony2. – Akina. However, what I get is NULL, instead of the expected INT that represents seconds between two times. Connect and share knowledge within a single location that is structured and easy to search. The table set might indeed become large in the long run, so that is why this answer is a little bit more usefull for me than the other, though appreciate Sebastian's answer aswell. jooq. Converts the number of seconds from unix epoch (1970-01-01 00:00:00 UTC) to a string representing the timestamp of that moment in the current system time zone in the given format. 返回值. Return values from temporal functions include fractional seconds as appropriate. timestampdiff(unit,datetime_expr1,datetime_expr2)中unit选项 FRAC_SECOND。表示间隔是毫秒 SECOND。秒 MINUTE。分钟 HOUR。小时 DAY。天 WEEK。星期 MONTH。月 QUARTER。季度 YEAR。年. I have a problem with my query , where by even if I post now the post ,the TIMESTAMPDIFF Does not work with MINUTE . TIMESTAMPDIFF ( unit type, datetime expression1, datetime expression2); Unit is used to express the difference of datetime or date in days, months, etc. 1 Mysql 5. datetime_expr1 and datetime_expr2 must be of the DATE or DATETIME type. 3 is really old -- you really should update to a more recent version : You'll get more support ; Lots of bug fixes; New features and enhancements; And, probably, better performancesThat's because from_unixtime (emphasis mine):. Fortunately, MySQL provides a handy date function to make such calculations easy-breezy – say hello to the MySQL datediff function. This function only works correctly at the level of seconds for timestamps within a few days of each other; it overflows gracelessly (as I discovered with great pain). 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.