Use this link to know how to get accurate result using EXTRACT () and JULIAN_DAY () function. 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。. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. I am using below code for today and database date. The value returned is an. Fractional seconds for TIME , DATETIME, and TIMESTAMP values are supported, with up to microsecond precision. 0. Select TIMESTAMPDIFF (SECOND, TIME (a. . 2022/11/26. Alternatively I could use the difference between the start and end columns, as long as it returned the time in "ss. Improve this answer. Strangely some of the rows return a NULL, and I am unable to understand why. Павел П. To determine how many years old each of your pets is, use the TIMESTAMPDIFF () function. 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. TiDB 会尽量与 MySQL 的行为保持一致，但可能无法在所有. . 1. Note: You need to pass two date / datetime. 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. timeDiff), SECOND(x. 2 MySQL datediff strange results. My guess - he used EXTRACT (SECONDS FROM. The unit for the result (an integer) is given by the unit argument. Follow. SELECT current_timestamp() => 2018-01-18 12:05:34 which can be converted to seconds timestamp as. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. A date value is treated as a datetime with a default time part '00:00:00'. Share. If I change the second column statement (the one on the 8th) to TIMESTAMPDIFF(SECOND, "2021-11-08 01:59:59-04:00", "2021-11-08 01:00:01-06:00") (only changing the offset) then MySQL's answer changes to 3602. 이 외에도 차이를 연, 분기, 월, 주, 일, 시, 분, 초를 지정하여 가져올 때 사용하는 함수가 timestampdiff. You don't need to perform annotate or aggregate if you need difference for all the records. 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. user1864610. select(sum(df. Sorted by: 18. , begin is a DATE value and end is a DATETIME value. 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. The latter is longer, but in terms of cpu time should be faster. 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 your data is stored in the table in one time zone (i. 1. SyntaxSubtracting timestamps in MySQL. Improve this answer. SELECT ROUND ( (UNIX_TIMESTAMP () - UNIX_TIMESTAMP (datetime_col)) / 60) That is returning the seconds between both time stamps. 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 following is the query to calculate the difference between two timestamps. Param2 FROM Table1 t1 LEFT JOIN Table2 t2 ON ABS(TIMESTAMPDIFF(SECOND,t1. The difference is 25 (hours). But when I try to save the output "TIMEDIFF" into a temporary table as Datatype Integer/datetime/time it saves as a different value. 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,. Though, if you have an index on the timestamp column, this would be faster because it could utilize an index on the timestamp column if you have one: SELECT * FROM table WHERE. This implies that the difference between times should not be more then 30 seconds. The value specifies the interval that is used. Let us walk through them quickly: To calculate the difference between dates in days – SELECT DATEDIFF (`DATE-A`, `DATE-B`) FROM `TABLE`. unit：指定返回时间差的单位。. The MySQL TIMESTAMPDIFF on the other hand can do a datetime second comparison: SELECT TIMESTAMPDIFF(SECOND,'2013-01-14 10:59:10', '2013-01-17 11:50:34'); # returns 262284 The result, 262284, is the real seconds between the two dates. TimeStamp1, t1. minutes = total_seconds DIV 60. FROM_UNIXTIME doesn't work with negative timestamps. end_date - INTERVAL (q. 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. Syntax. Take a look at the code below - notice the 1 millisecond difference in the two returned values. TIMESTAMPDIFF ¶ Calculates the difference between two date, time, or timestamp expressions based on the specified date or time part. Weeks, quarters, and years follow from that. The schema is SYSIBM. @Bruno - If the data types are TIMESTAMP WITH TIME ZONE, the interval that results from subtracting the two should take care of any time zone/ daylight savings time conversion. The following query selects all rows with a date_col value from within the last 30 days: . The Syntax. I have my SQL statement like this trying to get the difference in 2 timestamps greater than 10 minutes. TIMESTAMPDIFF. If you wanted to avoid SEC_TO_TIME (seconds), you can build up the string yourself. Actually the data type for the columns is TIME, and this a sample of data stored: 07:11:40 07:11:56. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. 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. 6. (Consider handling of open/close that span a daylight savings time change. The latter is longer, but in terms of cpu time should be faster. 1 Answer. Stack Overflow. edited Aug 21, 2018 at 17:38. 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. But I don't know how to output that data in my foreach-loop below. -- ===== Remove the "x" from my email address Jerry Stuckle JDS Computer Training Corp. 4, the instances are limited in which a fractional seconds part is permitted in temporal values. 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. Syntax : DATEDIFF ( datepart , startdate , enddate ) You should use TIMEDIFF() or TIMESTAMPDIFF() function. e. The argument order and syntax is also different. Usage and definition for TIMESTAMPDIFF function (Doc ID 2756136. Use: SELECT to_Char (start_dte,'DD. mysql> SELECT something FROM tbl_name-> WHERE DATE_SUB(CURDATE(),INTERVAL 30 DAY) <= date_col;. Solution is using select timestampdiff(DAY, '2016-04-13 11:00:01', '2016-04-14 11:00:00'); (note the opposite. The function counts whole elapsed units based on UTC with a DAY being 86400 seconds. Alternate Solution ( get the difference in Seconds ) SELECT TIMESTAMPDIFF(SECOND,NOW(),'2011-06-14 17:22:52'); Reference. This function computes the time difference between the input timestamp and '1970-01-01 00:00:00', providing the result in seconds. 3. You can use the MySQL HOUR(), MINUTE() and SECOND() functions to break the time returned from SEC_TO_TIME into its components. Use DSL. Oracle also dont support NOW() function in mysql. MySQL DATEDIFF: Calculate Days Between Two Dates. g. 1 Answer. More information on time_format:. TIMESTAMPDIFF. SELECT UNIX_TIMESTAMP(current_timestamp()) => 1516272429 To. DATEDIFF in Aurora MySQL only calculates differences in days. My SQL query is correct in answers alone but when it comes to the format it fails. Unix time, leap seconds, and converting Unix time to a dateMySQL interval is an operator, which is based on the binary search algorithm to search the items and returns the value from 0 to N. imei as imei, f. Note: Since the the Unix Epoch date is based on UTC, when your MySQL server uses a timezone with an offset, using FROM_UNIXTIME(seconds - seconds_from_epoch), the resulting datetime will be off by that offset. 212k 129 690 1515. Let’s focus on the data types that can store a date: DATE: used for values that contain a date but no time. TIMESTAMPDIFF giving unexpected result. *, 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. If you are experiencing this bug, a good alternative is to use TIMESTAMPDIFF and then get the sum of the column you create. TIMESTAMPDIFF ( unit type, datetime expression1, datetime expression2); Unit is used to express the difference of datetime or date in days, months, etc. MySQL has a built-in function called TIMESTAMPDIFF, which we can use to calculate the difference between two timestamps in various units of measurement. 1) Last updated on APRIL 12, 2021. The function supports units of years, quarters, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds. Another approach would be (assuming you sort out the above issue) to store the time intervals as seconds using TIMESTAMPDIFF(): UPDATE my_table SET time_spent=TIMESTAMPDIFF(start, end)); SELECT SEC_TO_TIME(SUM(time_spent)). minDt, tbl. 0. Teams. 引数は、結果を表す単位と、差異を取る 2. Getting minute difference between two timestamps in mysql using TIMESTAMPDIFF. day) and then does the subtraction. UNIT can be SECOND MINUTE HOUR DAY WEEK. execution_time* (q. 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. FROM_UNIXTIME (ms * 0. Simple but elegant. time_start) / 60 as diff_minutes. – Akina. It accepts three arguments, which are used for the initial value, the amount to add, and the unit to use. Result is expressed as a time value (and it has the limitations of the time data. . unit – Denota la unidad para el resultado. It only returns the result in days. 770. The unit value may be specified using one of keywords as shown,. The supported range is '1000-01-01 00:00:00' to '9999-12-31 23:59:59'. TIMESTAMPDIFF excludes the start date in its calculation. For example if the result is 490 seconds, since it is greater than 59. datetime_expr1. If you divide until day, you are fine (every single day every year has the same amount of seconds). Calculating the number of weeks between two dates: SELECT CONCAT (first_name, ' ', last_name) AS full_name, employment_date, FLOOR (DATEDIFF (CURRENT_DATE, employment_date) / 7) AS weeks_difference FROM employees; In this example, the DATEDIFF () function calculates the number of days between today’s date. answered Oct 2, 2017 at. = 1-- Query using TIMESTAMPDIFF() # Write your MySQL query statement below. I would have just commented this, but just joined. Q&A for work. TIMESTAMPDIFF(MINUTE,T. timediff(`date2`, `date1`) which gives me the time difference but if the days are different it does not account for the day difference. Months aren't an issue in this case since subtracting two timestamps just use days and seconds but 'days' can be a problem. I would like to be able to calculate difference. Here, exp. This function takes three arguments: the unit of time you want to measure the difference in (e. TIMESTAMPDIFF in a php foreach-loop. . 2 Answers. Example-3. MySQL :: MySQL 5. g. 3. id) FROM responses r LEFT JOIN participants p ON r. An expression that returns a value that is a built-in SMALLINT or INTEGER data type. SQL SELECT DATEDIFF (end_time, start_time) as `difference` FROM timeattendance WHERE timeattendance_id = '1484' start_time = 2012-01-01 12:00:00 end_time = 2012-01-02 13:00:00. . This method returns the difference between two dates in the units supplied as the first parameter. 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. The following query selects all rows with a. Below would correct the most popular answer to return hours as an integer and minutes as a decimal (ie 6. Note that unit values can be different in SQL Server DATEDIFF and MariaDB TIMESTAMPDIFF. 3. For second, the maximum difference is 68 years, 19 days, 3 hours, 14 minutes and 7 seconds. Returns datetime_expr2 - datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. Discussion: To calculate the difference between the timestamps in MySQL, use the TIMESTAMPDIFF (unit, start, end) function. In his requirements, the start time is in the past, but the result is a positive time difference. To find the difference between two datetime values, you can use TIMESTAMPDIFF (). To get Current timezone of the mysql you can do following things: SELECT @@system_time_zone; # from this you can get the system timezone SELECT IF (@@session. The unit argument can be MICROSECOND , SECOND , MINUTE , HOUR , DAY , WEEK , MONTH , QUARTER , or YEAR . 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. PHP MySQL TIMESTAMPDIFF with seconds not working. So the TIMESTAMPDIFF(MINUTE. SQLSyntaxErrorException: ORA-00904: "TIMESTAMPDIFF": invalid ID. According to the documentation, the first argument can be any of the following: MICROSECOND SECOND MINUTE HOUR DAY WEEK MONTH QUARTER YEAR2 Answers. Weeks, quarters, and years follow from that. This is the syntax: select TIMEDIFF('2020/01/30 T00:00:00. You can use the DATE () function to extract the date portion of the timestamp: SELECT * FROM table WHERE DATE (timestamp) = '2012-05-25'. Here is an example that uses date functions. This function calculates the difference between two datetimes in a specified unit (such as seconds, minutes, hours, days, etc. 1. I am using the below query to find the time difference in minutes. In SQL Server, you can use DATEDIFF function to get the datetime difference in specified units. mysql> SELECT TIMESTAMPDIFF (MINUTE,'2003-02-01','2003-05-01 12:05:55'); -> 128885. Behavior Type. 6 Reference Manual. 3 Answers. The SEC_TO_TIME () function converts numeric seconds into a time value (in format HH:MM:SS). 1. For example: select col1, avg (timestampdiff (SECOND, startTimestamp, endTimestamp)) as avgdiff from table group by col1. To get the difference in seconds as we have done here, choose SECOND . 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. , day, month, etc). Another argument provides the unit for the result. If you are using timestamp, this could be the solution in MySQL using SQL. Some people might also find it easier to read (oh, does timestamp diff. About;. 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). 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. Follow answered Jun 7, 2018 at 11:23. So we could modify the previous example so that TIMESTAMPDIFF. Documentation of MySQL tells that . The result, 262284, is the real seconds between the two dates. startdate = 2010-02-23 02:59:52. id) FROM. 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. +1 for to the point the stored timestamp is less than x minutes. Here is an example that uses date functions. Select timestampdiff(SECONDS, '2023-09-20 12:30:15', '2023-09-01 10:15:00') as Difference; The above query statement will return the different between the two datetime. Default: 60; Record fetch size: Number of records to fetch at once. I am using MySQL. Reading time: 2 minutes. 5 Date Calculations. If the value returned from TIMEDIFF () is greater than 5 minutes, the record it represents will be returned. If start is greater than end the result is negative. SELECT TIME_TO_SEC(TIMEDIFF(timea,timeb)+0)/60/60 SELECT TIMESTAMPDIFF(HOUR,timeb,timea) Note that when using DATEDIFF , the value returned is a difference between the date components of the given time - thus, a value of 23:59 on one day compared to a value of 0:01 on the next (a 2 minute difference) results in a date. Some days have an extra second or two seconds depending on the year. 2. MySQL has a handy function TIMESTAMPDIFF which can calculate the difference between two timestamps in a variety of units, including seconds. For SQLITE, the condition should be For SQLITE, the condition should be '(JulianDay(values. If your subtraction involves daylight savings change-overs, a particular. The DATEDIFF() function returns the time between two dates. 3 Answers. Description. SELECT TIMESTAMPDIFF (SECOND, start_time, end_time). elapse)/60 as diff from( SELECT c1. As a result, such columns use DATETIME display format, have the same range of values, and there is no. This function takes the difference between two dates and shows it in a date format yyyy-mm-dd. The second parameter of DATEDIFF takes a datetime so your string is implicitly converted to a datetime. Mysql TIMESTAMPDIFF for time datatype return negative value. Intervals store things internally as months, days, and seconds. MM. 私の実行系では TO_SECONDS() と同じ結果が得られました; Conclusion. The Syntax MySQL's TIMESTAMPDIFF () method is defined with the following syntax, accepting three required parameters: SELECT TIMESTAMPDIFF (unit,. 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. 0 [Release 1. The MySQL TIMESTAMP is a temporal data type that holds the combination of date and time. The TIMESTAMPDIFF () function will then return the difference in the unit specified. Switch between time and CURRENT_TIMESTAMP, you will get a positive number. userid,cb_users. EXTRACT. Sorted by: 4. timeDiff) FROM ( SELECT Sec_to_time(Avg (Timestampdiff (second, `survival`, `lastupdate`))) as. – Ergest Basha. I can mention four important functions of MS SQL Server that can be very useful: 1) The function DATEDIFF() is responsible to calculate differences between two dates, the result could be "year quarter month dayofyear day week hour minute second millisecond microsecond nanosecond", specified on the first parameter (datepart):. 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. I have a problem with my query , where by even if I post now the post ,the TIMESTAMPDIFF Does not work with MINUTE . 0. I need to produce a recordset that gives me the time between prints in seconds. I set up my MySQL database with the field 'time' It is not HH:MM in the traditional sense, it is the time an event occurred, so an event with the value of 5:45 occurred with 5 minutes 45 seconds left in a game. TIMESTAMPDIFF not working on mysql query in codeigniter. Your code is right, TIMESTAMPDIFF () returns a value after subtracting a datetime expression from another. How to convert second to formatted date time in mysql? I have a query to get date difference in second. I use the same date in both date parameters. It supports time series analysis by allowing you to calculate. If TIMEDIFF () returns -02:00:00, -00:05:00, or 00:04:00, then the record would be excluded. So I used TIMESTAMPDIFF in seconds. Improve this answer. Applies to: Oracle Fusion CX Sales Cloud Service - Version 11. 1. I have a column where I log all time entries of any event. YYYY-MM-DD HH:MM:SS. you can use mysql funcion timestampdiff like below. is_deleted IS NULL AND r. id-1 and f. Puede ser uno de los siguientes. Mysql 5. SET @date1 = '2010-10-11 00:00:00', @date2 =. It is not necessary that both the expression are of the same type. See it on sqlfiddle. So I used TIMESTAMPDIFF in seconds. timeDiff), MINUTE(x. MYSQL CREATE, ALTER, DROP, TRUNCATE, VIEW Tables. that you wish to see in the format you want. 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. You need to use the function available in your db in the below queryset. You don't need to perform annotate or aggregate if you need difference for all the records. Use a proper datetime type instead. select timestamp ('2021-01-02 03:04:05')-0;. Syntax :. The TIMESTAMPDIFF() function calculates the difference between two timestamps in a specified unit (seconds in our case). Example. I tried to look for a solution with annotate, but there is no support for aggregate functions in either mysql nor postgres. time_zone = 'SYSTEM', @@system_time_zone, @@session. MySQL - Comparing two dates in the. UNIX_TIMESTAMP () : This function in MySQL helps to return a Unix timestamp. The. B/c Time will extract only time from timestamp. SELECT SEC_TO_TIME. 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. datetime) - JulianDay(students. Check Further from Mysql Function MysqlDate Time Function. Add a comment. According to the documentation, the first argument can be any of the following: MICROSECOND SECOND MINUTE HOUR DAY WEEK MONTH QUARTER YEAR 2 Answers. g. DATE () Extract the date part of a date or datetime expression. For a complete list of built-in date and time functions, check the Flink documentation. 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) <=. PHP MySQL TIMESTAMPDIFF with seconds not working. Seconds (the absolute value of the duration must be less than 680105031408. How to Create and Drop Mysql Database using Command Line and PHP Script. use TIMESTAMPDIFF. speed as speed FROM stops f, stops f2 where f2. m. And it should include hours, minutes etc means it must be the full difference like 10:25:30 - 10:15:25 = 605 seconds. 1. By default, MySQL TIME fields allow a time range of '-838:59:59' to '838:59:59'. All this data is stored in a single table. – Ergest Basha. MySQL INSERT INTO SELECT Query with Examples. PHP MySQL TIMESTAMPDIFF with seconds not working. 1. TIME_START returns an interval which can be converted to seconds using extract () and those can be converted to minutes: extract (epoch from now () - a. Before MySQL 5. MySQL Date Functions. fin,NEW. 6. MySQL Database: Restore Database. g. After that you just select Hours, minutes, and seconds from that. id WHERE p. so actually you are doing. 6 Answers Sorted by: 11 You could use the native TIMESTAMPDIFF function : SELECT TIMESTAMPDIFF (<INTERVAL>,<timestampFrom>,<timestampTo>); If you. Description. 단순히 일 차이를 가져올 때 사용하는 것이 datediff 함수입니다. Here’s a quick rundown of the functions you can use in MySQL: ## #TIMESTAMPDIFF TIMESTAMPDIFF() returns the difference in the given unit. 3 Answers. Im not sure if using "AS thisisit" is a current function of TIMESTAMPDIFF but I. The query to create a table is as follows: mysql> create table convertTimeDifferenceDemo -> ( -> Id int NOT NULL AUTO_INCREMENT, -> StartDate. Method . Improve this answer. But now i have migrated my data to Oracle. 6. You can use this to get integer value. You can also phrase this without a function on one of the columns by just sing date arithmetic: where c2 <= c1 + interval 30 minute; The advantage of avoiding a function is that MySQL can -- in some circumstances -- take advantage of an index on one of the columns. 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. Connect and share knowledge within a single location that is structured and easy to search. TIMESTAMPDIFF giving unexpected result. 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. 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。. I ran all three examples with BENCHMARK with valid and invalid dates. Syntax : TIMESTAMPDIFF (unit,expr1,expr2). date_or_time_part must be one of the values listed in Supported Date. 001) Javascript timestamps, for example, are represented in milliseconds since the Unix epoch. my approach : set unit as SECOND and then use SEC_TO_TIME. SQL Server : -- Get difference in days SELECT DATEDIFF ( dd, '2022-09-01', '2022-09-05'); # 4. SELECT * FROM messages WHERE time > UNIX_TIMESTAMP (NOW ()) - 604800. values('id', 'diff_time')MySQL TIMESTAMPDIFF() function explained. Follow. 3. microseconds. Let us walk through them quickly: To calculate the difference between dates in days – SELECT DATEDIFF (`DATE-A`, `DATE-B`) FROM `TABLE`. The unit argument can be MICROSECOND, SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or YEAR. My database is mysql. 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。. minutes = total_seconds DIV 60.