1 Answer. 58 and found no overflow with timestamps differing by up to at least 10000 years. Tham số unit được sử dụng để định nghĩa đơn vị của giá trị được trả về. , day, month, etc). first_name, c. minutes = total_seconds DIV 60. The unit argument can be MICROSECOND , SECOND , MINUTE , HOUR , DAY , WEEK , MONTH , QUARTER , or YEAR . I have a table that contains among other things an id a time in the format date:time (YYYYhhmmss) and a readingvalue. 0. = 1-- Query using TIMESTAMPDIFF() # Write your MySQL query statement below. UNIT can be SECOND. birth)) / 365. ), the start timestamp, and the end timestamp. The unit argument can be MICROSECOND , SECOND , MINUTE , HOUR , DAY , WEEK , MONTH , QUARTER , or YEAR . That will give you the average differences for each distinct value of col1. SELECT * FROM tableName WHERE TIMESTAMPDIFF (MINUTE,timestamp,NOW ()) < 10. 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. e. 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. TIMEDIFF('00:04:50','23:59:59');. 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. I am using the below query to find the time difference in minutes. We can use the following syntax to create an interval value: INTERVAL expr unit. I use the same date in both date parameters. 212k 129 690 1515. 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. The unit for interval is given by the unit argument, which should be one of the following values: MICROSECOND, SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or YEAR. 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. 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. Improve this answer. SELECT * FROM table WHERE TIMESTAMPDIFF (MINUTE,timestamp,NOW ()) AS thisisit. Check the line when timestampdiff (minute, created_on, current_timestamp) > 3 AND < 60 then " minutes ago" to be correct you should change to when timestampdiff (minute, created_on, current_timestamp) > 3 AND timestampdiff (minute, created_on, current_timestamp) < 60 then " minutes ago". MySQL 計算兩個日期時間的間隔 TIMESTAMPDIFF() MySQL 可以用 TIMESTAMPDIFF() 函數來相減兩個 datetime 或 date。 TIMESTAMPDIFF() 語法 (Syntax) TIMESTAMPDIFF(unit, datetime_expr1, datetime_expr2) TIMESTAMPDIFF() 會返回 datetime_expr2 − datetime_expr1 相減後的整數，其中 unit 表示整數的單位要是什麼。DATEDIFF: . I am not sure whether there is any inbuilt function for that or not, i think it can be done by applying simple mathematics. Teams. 返回：end - begin 的时间差，并以 unit 指定的单位进行输出。. SELECT start, end, TIMESTAMPDIFF(HOUR, `start`, `end`) FROM table1 WHERE start >="2018-01-01" AND ende <= "2018-12-31. 000000) if empty ,TimeStampDiff(SECOND, Current Date, Current Timestamp) As SecondIt seems there were some bugs with that function, on old versions of MySQL 5. 770. The MySQL server can be run with the MAXDB SQL mode enabled. g. Add a comment. In MySQL, the TIMESTAMPADD () function allows you to add a specified amount of time to a date or datetime value. 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. select TIMESTAMPDIFF (SECOND, '2018-09-05 09:26:38', NOW ()); TIMESTAMPDIFF () accepts three. PHP MySQL TIMESTAMPDIFF with seconds not working. SELECT timestampdiff (minute,created_at,now ()) AS TIMEDIFF Below is the TIMEDIFF in minutes using the above query id TIMEDIFF. mysql. is_ignored IS NULL AND r. datetime_expr1 and datetime_expr2 must be of the DATE or DATETIME type. Param2 FROM Table1 t1 LEFT JOIN Table2 t2 ON ABS(TIMESTAMPDIFF(SECOND,t1. . I would recommend to choose that unit. 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; 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 Introduction. TimeStamp2, t2. What is interval. 6. UTC) and you want it in another time zone then use: CAST ( date_value AS TIMESTAMP ) to convert it from a DATE data type to a TIMESTAMP data type. SECONDS is not a valid unit. The timestamp difference returns the difference between two dates in seconds. Jan. The functions in this section use a format string that is compatible with the MySQL date_parse and str_to_date functions. createDate) maxDt FROM Impressions i INNER JOIN carts c ON (i. As an example, if we entirely ignore any "seconds" portion of the datetime/timestamps, and work with whole minutes, something like this: NOTE: this is not fully tested. 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. 1. I am using below code for today and database date. Thanks, this answer works aswell. The supported range is '1000-01-01 00:00:00' to '9999-12-31 23:59:59'. ThanksBased on the format string ‘%d, %m, %Y’, the STR_TO_DATE() function scans the ‘21,5,2013’ input string. If you are experiencing this bug, a good alternative is to use TIMESTAMPDIFF and then get the sum of the column you create. TIMESTAMPDIFF. now () - a. SELECT timestampdiff (minute,created_at,now ()) AS TIMEDIFF. It returns an integer as a result. It returns zero if it a date, NULL if not. to minutes select a= TIMESTAMPDIFF(SECOND,P_date1 ,P_date2). Here’s an example that returns the difference in minutes. 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. execution_time* (q. For EST using FROM_UNIXTIME will result. The main problem is as follows: In order to find the difference between days you need to use datediff(); datediff() returns the difference in days. Get your own SQL server SQL Statement: Edit the SQL Statement, and click "Run SQL" to see the result. I suggest you keep your difference in seconds, and when presenting it you adapt it as necessary. 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. It returns an integer as a result. Param1, t2. 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 SEC_TO_TIME () function converts numeric seconds into a time value (in format HH:MM:SS). mysql> SELECT. Here's the sql:. Example 1 : Getting the differences between two specified time values where the time is specified in the format of YYYY-MM-DD HH-MM-SS. 097332 trigger_time = 2021-10-10 14:11:13. SELECT TIMESTAMPDIFF(SECOND, '2020-05-06 01:00:00', '2020-05-07 02:00:00') as time_difference; In this SQL statement, TIMESTAMPDIFF is the function. Convert from epoch to date. orders. timeDiff), MINUTE(x. Timestampdiff () function takes three arguments. Follow. DATE_ADD (date, INTERVAL expr unit) A date or datetime expression. SELECT ABS (TIMESTAMPDIFF (SECOND, start_time, end_time)). B/c Time will extract only time from timestamp. Modified 9 years ago. The PROCESS_START_DATE column in query have data which contains date and time. ). Ask Question Asked 9 years ago. SELECT TIMESTAMPDIFF(HOUR, '2010-11-29 13:13:55', '2010-11-29 13:16:55') as newtable; | newtable | 7 1 row in set (0. The unit for the result (an integer) is given by the unit argument. 이 외에도 차이를 연, 분기, 월, 주, 일, 시, 분, 초를 지정하여 가져올 때 사용하는 함수가 timestampdiff. Teams. 0. `time_column. Use mysql's timestampdiff () function to calculate the difference and use from_unixtime () function to convert the timestamp into a datetime data type. speed as speed FROM stops f, stops f2 where f2. The MySQL TIMESTAMPDIFF() function is used to find the difference between two date or datetime expressions. Subtracts the 2nd argument from the 1st (date1 − date2). I want to create one new generated column that contains time difference of the two datetime columns. PHP MySQL TIMESTAMPDIFF with seconds not working. 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. It accepts three arguments, which are used for the initial value, the amount to add, and the unit to use. TIMESTAMPDIFF. It only returns the result in days. Your last edit returned 25 minutes and 19 seconds. 0. But now i have migrated my data to Oracle. Teams. Follow. Since TIMESTAMP in mysql is stored as a 32bit value representing the time interval from 1970-jan-1 0:00:00 in seconds, I assumed that using minus (-) operator on TIMESTAMP values would give the difference of these values in seconds. Your query string would look like this:Your problem is that TIMESTAMPDIFF effectively first truncates the values to the indicated precision (e. Discussion: To calculate the difference between the timestamps in MySQL, use the TIMESTAMPDIFF (unit, start, end) function. 1. 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. 日期和时间函数. TIMESTAMPDIFF giving unexpected result. Mysql Timediff function is not working for me for long date. 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. DATEDIFF() seconds with millisecond to float or decimal. 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. 2355:46:39. All you need is to execute the code below and then use the function. Clearly your system or JVM is not configured to use UTC time. 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. status_timestamp < tmain. Alternatively, for the difference between dates in minutes, hours, days, weeks, months, or years – SELECT TIMESTAMPDIFF (UNIT, `DATE-A`, `DATE-B`) FROM `TABLE`. To calculate the difference between two date/datetime expressions, use TIMESTAMPDIFF. Is there any way around this so the result of the query can go. 2. The unit argument can be MICROSECOND,. maxDt)) AS Duration FROM (SELECT DATE(i. MySQL retrieves and displays DATETIME values in 'YYYY-MM-DD hh:mm:ss' format. About;. Month-difference between any given two dates: Have a look at the TIMESTAMPDIFF () function in MySQL. Weeks, quarters, and years follow from that. 私の実行系では TO_SECONDS() と同じ結果が得られました; Conclusion. I am migration mysql to Postgres Runing this bellow query on both Mysql and Postgres SELECT cb_sessions. TIMEDIFF () is essential for time-based analysis by enabling you to measure the duration of events or actions. I have a problem with my query , where by even if I post now the post ,the TIMESTAMPDIFF Does not work with MINUTE . How can i store the return value from the timestampdiff function. 1. One alternative would be to define a function (MySQL stored program) that will calculate that difference. Thanks - I just tried this: abs (timestampdiff (month, H1DAT, '2015-07-01')) But it just returns a number of days of something. – Tim Biegeleisen. payment_time = 2021-10-29 07:06:32. The value returned is an. TIMESTAMPDIFF - How to use it in. a call to timestampdiff:日付関数 (比較, 加算, 差分, 抽出)の使い方. 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. Share. Conclusion. 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. Simple but elegant. And most of the time, this will require calculating the number of days between date values. The. 6. Usage and definition for TIMESTAMPDIFF function (Doc ID 2756136. @Enrico - Not true. Documentation of MySQL tells that . 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. e . TIMESTAMPDIFF. The schema is SYSIBM. Change the unit time to second and then convert the diff second to time. you can use mysql funcion timestampdiff like below. microseconds. The timestamp difference returns the difference between two dates in seconds. Then you can convert seconds to minutes, or days, or months, or etc within your case statement, depending where they fall in the range. The TIMESTAMPDIFF() function will then return the difference in the specified unit. Alternatively, for the difference between dates in minutes, hours, days, weeks, months, or years – SELECT TIMESTAMPDIFF (UNIT, `DATE-A`, `DATE-B`) FROM `TABLE`. . SELECT current_timestamp() => 2018-01-18 12:05:34 which can be converted to seconds timestamp as. TIMESTAMPDIFF (unit,datetime_expr1,datetime_expr2); datetime_expr1. 2 Answers. id, f. Some days have an extra second or two seconds depending on the year. 0. 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. 11. So in case we want to calculate a gap greater than 838 hours we need s olution, which could be the following one: # Number of days * 24 + time difference. answered Oct 2, 2017 at 13:25. 01. The latter is longer, but in terms of cpu time should be faster. g. 4, the instances are limited in which a fractional seconds part is permitted in temporal values. 25 < ?'I'm trying to add seconds to a date based on certain events that occur. In this case, TIMESTAMP is identical with DATETIME. mysql timediff no proper output when endtime is 24hrs. 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):. 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". I have tried this using TIMESTAMPDIFF(microsecond,Start,End)as diff but it is to milliseconds and I don't know how to convert it to "ss. Note that unit values can be different in SQL Server DATEDIFF and MariaDB TIMESTAMPDIFF. Description. id_participant = p. *, 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. montant / (datediff (NEW. MySQLで利用できる日付関数について確認します。. ). calculate time diffrence in mysql by seconds. 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. 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. . Sorted by: 4. A value of 0 signifies that there. If you get a much shorter list of. 0. So maybe this problem has been fixed. 59) %s: Seconds (00. 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. TIMESTAMPDIFF giving unexpected result. It is mainly used to calculate the date and time values. Functions that return the current date or time each are evaluated only once per query at the start of query execution. The TIMESTAMPDIFF function returns an estimated number of intervals of the type defined by the first argument, based on the difference between two timestamps. id) FROM. PHP MySQL TIMESTAMPDIFF with seconds not working. PHP MySQL TIMESTAMPDIFF with seconds not working. 1 Answer. Definition and Usage. 1. There are five data types in MySQL. Your first answer. This function takes the difference between two dates and shows it in a date format yyyy-mm-dd. To get the 2 status codes into a single record, use a subquery to get the init records only and join it back to your table filtered saved:I need to calculate the total length in terms of Hours, Minutes, Seconds, and the average length, given some data with start time and end time. To find the difference between two datetime values, you can use TIMESTAMPDIFF (). 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. TIMESTAMPDIFF(MINUTE,T. . The null DATETIME columns cause the TIMESTAMPDIFF () function to return NULL. Subtracts the 2nd argument from the 3rd (date2 − date1). SELECT * FROM tableName WHERE now () - interval 10 minute < stored_timestamp. Intervals store things internally as months, days, and seconds. 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. If your data is stored in the table in one time zone (i. , begin is a DATE value and end is a DATETIME value. You don't need to perform annotate or aggregate if you need difference for all the records. The basic syntax: TIMESTAMPDIFF(unit,datetime1,datetime2); You can find a list with different types of units, check out the list in the section above. "timestamp" is a column in MYSQL which I hold a timstamp as such "1365793346". – Akina. 引数は、結果を表す単位と、差異を取る 2. DATE_ADD, DATE_SUB, TIMESTAMPADD. 5 hours). And when specifying second instead of microsecond it. 000Z','2020/01/28. description, is_active, (SELECT COUNT(r. Another argument provides the unit for the result. Improve this answer. I would have just commented this, but just joined. timestampdiff. In case you use a DATE value, the TIMESTAMPDIFF function treats it as a DATETIME value whose time part is. frequency. . Learn more about TeamsReturns. Set to 0 (zero) to have Dremio automatically decide. . transaction_pk = tmain. status_timestamp) FROM t tsub WHERE tsub. Take a look at the code below - notice the 1 millisecond difference in the two returned values. TIMESTAMPDIFF not working on mysql query in codeigniter. 0. MySQL TIMESTAMPADD () 函数将指定的时间间隔 interval 加到一个日期时间值上并返回结果。. The value returned is an INTEGER, the number of these intervals between the two timestamps. Improve this answer. TIMESTAMPDIFF. Syntax. 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. time_zone) # This will give you time zone if system timezone is different from global timezone. For example: select col1, avg (timestampdiff (SECOND, startTimestamp, endTimestamp)) as avgdiff from table group by col1. datetime) - JulianDay(students. 2 Answers. NOTE the most voted up answer in this chain is INCORRECT! Using HOUR will only return hours as an integer. You need to use the function available in your db in the below queryset. MySQL is quite different from SQLite. 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. The problem is that you want to use TIMESTAMPDIFF on the entire no_id. So, I would like to group them by gateway ID and have the value in hours, minutes and seconds. As you see, it expects the parameters to be of type. SQL Server : -- Get difference in days SELECT DATEDIFF ( dd, '2022-09-01', '2022-09-05'); # 4. Example of the possible combinations below: Interval. 6 Answers Sorted by: 11 You could use the native TIMESTAMPDIFF function : SELECT TIMESTAMPDIFF (<INTERVAL>,<timestampFrom>,<timestampTo>); If you. I have a table which contains 2 columns date_picked_begin and date_picked and there will be multiple rows which contain a date in each. SELECT TIMESTAMPDIFF(SECOND, '2012-06-03 13:13:55', '2012-06-06 15:20:18') sec Now I need to convert this seconds in date time in SQL. 1. Similar to Timo Kähkönen's answer, I've used TIMESTAMPDIFF to determine if a date is valid like ISDATE does. I have a table in which I am trying to sum times on the same column. E_START_DATETIME_PST),. To understand the MySQL convert timediff output to day, hour, minute, and second format, you need to use CONCAT () from MySQL. A date value is treated as a datetime with a default time part '00:00:00'. id, f. You still need to divide it by 60 and round the result. mmm". The function subtracts one datetime value from the other in the specified unit. Method 2: Using the TIMESTAMPDIFF() Function. The function requires a unit of time value that you want to retrieve and two datetime expressions. 0. Behavior Type. So maybe this problem has. The argument order and syntax is also different. 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. If the second date or time is earlier than the first date or time, the result is negative. . objects. 2. Net write timeout (in seconds): Seconds to wait for data from the server before aborting the connection. In Sybase ASE you can use DATEDIFF function to get the difference between two datetime. Only show hours in MYSQL DATEDIFF. If start is greater than end the result is negative. 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. Some people might also find it easier to read (oh, does timestamp diff. For example: CREATE TABLE t1 (t TIME (3), dt DATETIME (6)); The fsp value, if given, must be in the range 0 to 6. 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 Syntax MySQL's TIMESTAMPDIFF () method is defined with the following syntax, accepting three required parameters: SELECT TIMESTAMPDIFF (unit,. timestamp,f. You would sum up the differences between the timestamps, then use that value (would be in milliseconds) to get the time: SELECT SEC_TO_TIME (time_milis / 1000) FROM ( SELECT SUM (UNIX_TIMESTAMP (date1) - UNIX_TIMESTAMP (date2)) as time_milis FROM table ). 001) Javascript timestamps, for example, are represented in milliseconds since the Unix epoch. In his requirements, the start time is in the past, but the result is a positive time difference. The query to create a table is as follows: mysql> create table convertTimeDifferenceDemo -> ( -> Id int NOT NULL AUTO_INCREMENT, -> StartDate. 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. 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. In SQL Server, you can use DATEDIFF function to get the datetime difference in specified units. 4. The above works as expected. -- Display TimeStampDiff in truncated Seconds and Microseconds-- TimeStampDiff will set the time to midnight (00:00:00. 8,597 2 16 27. 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). The function allows you to calculate time differences in units other than seconds, such as years, months, or days. The function returns an INTEGER value representing the number of intervals between the two timestamps. Here, exp. timeDiff), SECOND(x. Return the current time. SELECT * FROM messages WHERE time > UNIX_TIMESTAMP (NOW ()) - 604800. You could use the microsecond unit and divide by 1000 - MySQL doesn't appear to support milliseconds. From the msdn, it returns the count (signed integer) of the specified datepart boundaries crossed between the specified startdate and enddate. SELECT id, Present, Date, Time, SEC_TO_TIME (TIMESTAMPDIFF. 1. 6 Fractional Seconds in Time Values - MySQL 5. timestampdiff Description. EDIT The example abovee works only on mysql databases. runTime,NOW()) > 20. 3. 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. 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. 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.