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3 paź 2014 · I am storing the last login time in MySQL in, datetime-type filed. When users logs in, I want to get the difference between the last login time and the current time (which I get using NOW() ). How can I calculate it?
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. Syntax
The DATE, DATETIME, and TIMESTAMP types are related. This section describes their characteristics, how they are similar, and how they differ. MySQL recognizes DATE, DATETIME, and TIMESTAMP values in several formats, described in Section 11.1.3, “Date and Time Literals”.
STR_TO_DATE() returns a DATETIME value if the format string contains both date and time parts, or a DATE or TIME value if the string contains only date or time parts. If str or format is NULL , the function returns NULL .
13 wrz 2024 · What is the difference between DATETIME and TIMESTAMP in MySQL? DATETIME stores date and time as-is, without considering the timezone. It is consistent across different time zones and has a larger range (from the year 1000 to 9999).
The TIME is interpreted as elapsed time (not time of day) and added to the date. This means that the date part of the result differs from the current date if the time value is outside the range from '00:00:00' to '23:59:59'. Suppose that the current date is '2012-01-01'.
In MySQL, the datetime data type is used to store date and time values together. The format for datetime values is ‘YYYY-MM-DD HH:MM:SS’, which represents the year, month, day, hour, minute, and second, respectively.
