Datetime vs Date and Time Mysql

Question

I generally use datetime field to store created_time updated time of data within an application.

But now i have come across a database table where they have kept dat

Answer 1

The tricky part is when you have to do date arithmetic on a time value and you do not want a date portion coming into the mix. Ex:

myapptdate = 2014-01-02 09:00:00

Select such and such where myapptdate between 2014-01-02 07:00:00 and 2014-01-02 13:00:00

1900-01-02 07:00:00 2014-01-02 07:00:00