The function supports units of years, quarters, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds. For DATEDIFF: dateortimeexpr1 and dateortimeexpr2 can be a date, time, or timestamp. However, TIMEDIFF() requires that both arguments are of the same type, so we get NULL, even though both arguments are of a type that the function supports (time and date-and-time). For both DATEDIFF and minus sign: Output values can be negative, for example, -12 days. So we can see that DATEDIFF() handles mixed data types fine (as long as they’re either date or date-and-time). Here’s what happens if you provide two different data types to each function. However, the middle two results had the wrong data type passed in and therefore the correct result couldn’t be calculated. The first and last results are fine, because the correct argument types were passed in. | DATEDIFF Date | DATEDIFF Time | TIMEDIFF Date | TIMEDIFF Time | The DATEDIFF () function returns the number of days between two date values. SET = '', = '', = '12:15:35', = AS 'DATEDIFF AS 'DATEDIFF AS 'TIMEDIFF AS 'TIMEDIFF Time' Here’s an example of what happens when you pass the wrong argument types to each function. The MySQL DATEDIFF function calculates the number of days between two DATE, DATETIME, or TIMESTAMP values. It shows us that there are 36 hours, 15 minutes, and 35 seconds between the two date-and-time values. 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 ticketid, timediff (max (timestamp), min (timestamp)) as diff, timestampdiff (hour, min (timestamp), max (timestamp)) as diffinhours, timestampdiff (minute, min (timestamp), max. The TIMEDIFF() function, on the other hand, compares the time, and therefore it returns a more precise result. at 15:03 Add a comment 6 Answers Sorted by: 177 If you have MySql version above 5.6 you could use TIMESTAMPDIFF (unit,datetimeexpr1,datetimeexpr2) something like select from MyTab T where TIMESTAMPDIFF (MINUTE,T. This is because it only compares the date values (it ignores any time values). So DATEDIFF() returns the same result as in the previous example. Let’s see what happens if we increase the time value of one of the variables. So we can see that DATEDIFF() returned 1, meaning “1 day”, and TIMEDIFF() returned 24:00:00 which is the time representation of exactly 1 day. Here’s an example that demonstrates the basic difference between these functions. When invoked with the days form of the second argument, MySQL treats it as an integer number of days to be added to expr. The following table summarizes the difference between these two functions: DATEDIFF()Ĭompares only the date value of its arguments.Ĭompares the time value of its arguments.Īccepts date or date-and-time expressions.Īccepts time or date-and-time expressions.īoth arguments can be of a different type (date or date-and-time).īoth arguments must be the same type (either time or date-and-time). This function includes only the date parts of the arguments while calculating the difference.Two date functions included in MySQL are DATEDIFF() and TIMEDIFF().īoth functions do a similar thing, but with some meaningful differences. This function returns difference between the given date values in the form of days. The MYSQL DATEDIFF() function accepts two date or, date-time values as parameters, calculates the difference between them (argument1-argument2) and returns the result. 14 Answers Sorted by: 399 SELECT TIMEDIFF (' 10:02:00',' 12:01:01') - result: 22:00:59, the difference in HH:MM:SS format SELECT TIMESTAMPDIFF (SECOND,' 12:01:01',' 10:02:00') - result: 79259 the difference in seconds So, you can use TIMESTAMPDIFF for your purpose. MySQL provides a set of functions to manipulate these values. Where a time stamp is a numerical value representing the number of milliseconds from ' 00:00:01' UTC (epoch) to the specified time. The DATE, DATETIME and TIMESTAMP datatypes in MySQL are used to store the date, date and time, time stamp values respectively. MySQL DATEDIFF is used to find the difference between the specified dates.
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