Selecting records by date and time

i am having trouble with a select statement on a table (mysql) and no clue 开发者_开发技巧what the right solution could be. It looks quite simple. I am having a couple of records representig a flightlog. There is a field like date, which is the day of the flight an a field named time which is for example the landing time. Now i would like to select all flights before or in a range of particular dates an times to build up a sum of flighthours.

Eventually what i need is to get the actual flighthours summed up to a particular record to be identified by the day of flight and the landingtime.

My first attempt was like this

select * from flights where date < "2010-01-01" and landing <= "14:30";

But everybody knows (even me now) that this is only displaying records where the landingtime is less or equal "14:30" regardless of the day of flight.

Anybody here able to help me?

Many thx

cdjw

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Date fields are comprised of date and time. Combine the two. Then say where date between "2010-01-01 00:00:00" and "2010-01-01 14:30:00" (you know, however you'd format the dates to make that work.)