Question

Does MySql has the Interval datatype as PostgreSQL (or like TimeSpan in .net) does?

Answer 1

Nope, there is no time interval data type in MySQL. There is a feature request for one though, but apparently it hasn’t gotten much attention.

The time type can be used for such a purpose though, as suggested by the documentation

MySQL retrieves and displays TIME
values 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).