mysql - What difference between the DATE, TIME, DATETIME, and TIMESTAMP Types

Question

I need to store both time and date in the mysql. So I used of NOW() function for that. But I don't know what should I use for type column im phpmyadmin. It should be noted that NOW() returns both time and date like this:

2014-11-11 12:45:34

Here is a solution, I can use of a separator for separating date and time (2014-11-11 and 12:45:34) and then store them in the DATE type and TIME type individually. Or I can use of VARCHAR type for storing both of them in one column. But I think these ways are not standard. what is standard type for storing both date and time ?

Here is my query: (also I don't know why NOW() function does not works)

INSERT INTO table (timedate) VALUES (NOW())

Answer 1

DATE: It is used for values with a date part but no time part. MySQL retrieves and displays DATE values in YYYY-MM-DD format. The supported range is 1000-01-01 to 9999-12-31.

DATETIME: It is used for values that contain both date and time parts. MySQL retrieves and displays DATETIME values in YYYY-MM-DD HH:MM:SS format. The supported range is 1000-01-01 00:00:00 to 9999-12-31 23:59:59.

TIMESTAMP: It is also used for values that contain both date and time parts, and includes the time zone. TIMESTAMP has a range of 1970-01-01 00:00:01 UTC to 2038-01-19 03:14:07 UTC.

TIME: Its values are in HH:MM:SS format (or HHH:MM:SS format for large hours values). TIME values may range from -838:59:59 to 838:59:59. The hours part may be so large because the TIME type can be used not only to represent a time of day (which must be less than 24 hours), but also elapsed time or a time interval between two events (which may be much greater than 24 hours, or even negative).