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. 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 first and last results are fine, because the correct argument types were passed in. It is not necessary that both the expression are of the same type. | DATEDIFF Date | DATEDIFF Time | TIMEDIFF Date | TIMEDIFF Time | MySQL the TIMESTAMPDIFF () returns a value after subtracting a datetime expression from another. 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. It shows us that there are 36 hours, 15 minutes, and 35 seconds between the two date-and-time values. The TIMEDIFF() function, on the other hand, compares the time, and therefore it returns a more precise result. 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. 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. 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. The MYSQL DATEDIFF () function accepts two date or, date-time values as parameters, calculates the difference between them (argument1-argument2) and returns the result. 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 returns the count (as a signed integer value) of the specified datepart boundaries crossed between the specified startdate and enddate.
MySQL DATEDIFF() computes and returns the value of date1– date2.Two date functions included in MySQL are DATEDIFF() and TIMEDIFF().īoth functions do a similar thing, but with some meaningful differences. Note that DATEDIFF() calculates the differences by subtracting date2 from date1, i.e. Where, ‘date1’ and ‘date2’ are two date or datetime expressions.
Mysql date diff code#
Syntax of MySQL DATEDIFF() DATEDIFF(date1, date2) Code language: SQL (Structured Query Language) ( sql ) Let us dive deep and take a look at the syntax before we move on to the examples. In other words, it returns the number of days between two dates. The MySQL DATEDIFF() function is used to find the difference between two dates or datetime values. Let us see how we can use the MySQL DATEDIFF() function to solve this problem. But we have a computer and we know MySQL, so let us make things easy for ourselves. Some employees may have joined more than 5 years ago or so and besides, your CEO wants the exact number of days each employee has been in the company. Now doing this manually would be a mammoth task. The CEO of the company has tasked you with finding out how many days have elapsed since each employee joined the company. Suppose you are an HR executive at a company and you have data on the check-in date and time for each employee for today as well as the date they first joined the company in a table. In this tutorial, we will study the MySQL DATEDIFF() function.
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