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https://www.tutorialspoint.com/get-the-time-difference-and-convert-it-to-hours-in-mysql#:~:text=Here%20is%20the%20query%20that%20gets%20time%20difference,output%20displaying%20the%20time%20difference%20in%20hours%20%E2%88%92
https://stackoverflow.com/questions/10926739/how-to-get-time-difference-in-hours-between-2-dates
Only the date parts of the values are used in the calculation. You will want to look at TIMEDIFF. This will give you the number of hours in the difference in times (assuming your time_c fields are DATETIME or something similar) SELECT HOUR (TIMEDIFF ( (SELECT max (u1.time_c) FROM users u), (SELECT max (u2.time_c) FROM users u2) )) Share.
https://www.tutorialspoint.com/get-the-time-difference-and-convert-it-to-hours-in-mysql
Here is the query that gets time difference in hours. The query is as follows −. mysql> SELECT ABS(TIMESTAMPDIFF(HOUR,StartDateTime,EndDateTime)) as Hour from DifferenceInHours; The following is the output displaying the time difference in hours −. +------+ | Hour | +------+ | 22 | | 24 | | 23 | +------+ 3 rows in set (0.00 sec)
https://www.dailyrazor.com/blog/mysql-datediff/
Furthermore, as you can see from the above two examples when looking for the difference in two datetime expressions, the MySQL DateDiff hours is not a reliable solution. Once again, you can use the TimeStampDiff() function to get the job done. Let’s take look: Select timestampdiff(HOURS, '2023-09-20 12:30:15', '2023-09-01 10:15:00') as Difference;
https://www.w3schools.com/SQL/func_mysql_timediff.asp
The TIMEDIFF () function returns the difference between two time/datetime expressions. Note: time1 and time2 should be in the same format, and the calculation is time1 - time2.
https://www.w3resource.com/mysql/date-and-time-functions/mysql-timediff-function.php
MySQL TIMEDIFF () returns the differences between two time or datetime expressions. It is to be noted that two expressions must be the same type. Syntax: TIMEDIFF (expr1,expr2) Arguments. Name. Description. expr1. A datetime value.
https://www.w3schools.com/Sql/func_mysql_datediff.asp
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