Berkeley DB Family

Hi
I want to simulate sql table that have fields like this(int id,varchar name,datetime timein)
for simulate this situation I defined database and defined structure like this:

struct TimeDate{
int year;
short month;
short day;
short hour;
short minute;
short second;
};

typedef struct session {
int ID;
char *name;
struct TimeDate Timein;
}SESSION;

is this methood suitable for define datetime or not?
is it good to store unixtime in the database or this method ?

thanks
regards
saeed