lastout and firstin contain times such as 13:28:01 and 13:27:54.
If I use the query you gave me from within phpMyAdmin, the result I get is
7 seconds, exactly what it should be...but I do not know how to use PHP to
get the correct result, it is giving me 23. I am accustomed to using
mysql_result to get results but it needs to know the result variable
($result), the row (should be 0?), and then the last one is usually the
field name, but in this case I don't think I have one because I'm asking
it to select a math operation, so where does the result go, and how do I
get it with PHP? Thanks.
Nathan Cowles
On Mon, 4 Mar 2002, Paul DuBois wrote:
> At 13:35 -0800 3/4/02, Nathan Cowles wrote:
> >Paul,
> >
> >You're awesome...thank you. One more question pertaining to this...
> >
> >I'm accustomed to selecting a variable and using something like this:
> >
> >$firstin = mysql_result($result,$row,firstin);
> >
> >to set my variable.
> >
> >What do I want to do here to get the right result into my variable?
> >
> >$query2 = "SELECT SEC_TO_TIME(TIME_TO_SEC('$lastout') -
> >TIME_TO_SEC('$firstin'))";
> >$result2 = mysql_db_query($database, $query, $connection) or die
> >("Error in query: $query. " . mysql_error());
> >
> >This isn't working, I get 23:
> >
> >$total = mysql_result($result2,0);
>
> I guess it depends on what the values of $firstin and $lastout are, and
> how you're displaying the value of $total. It's hard to say anything
> without seeing more of the code.
>
> >
> >Thanks again!
> >
> >Nathan Cowles
> >
> >On Mon, 4 Mar 2002, Paul DuBois wrote:
> >
> >> >Hello,
> >> >
> >> >I am trying to get an accurate (nearest 15 minutes would be
> >> >fine) difference between two times that I have in my database. They are
> >> >both of type time, and are in the format 00:00:00.
> >> >
> >> >For example, if I want the difference between 09:20:00 and 10:43:00, I
> >> >would like it to give me 01:23:00 as the answer, but all I have been able
> >> >to get it to do is give me one. It is rounding to the nearest hour.
> >> >
> >> >I found this query which seems like it would work, but gives me a NULL
> >> >result set:
> >> >
> >> >SELECT DATE_SUB('11:48:02', INTERVAL '10:37:37' HOUR_SECOND);
> >>
> >> For two times t1 and t2, compute the difference in seconds like this:
> >>
> >> SELECT TIME_TO_SEC(t2) - TIME_TO_SEC(t1)
> >>
> >> If you want the result as a time value, pass it to SEC_TO_TIME():
> >>
> >> SELECT SEC_TO_TIME(TIME_TO_SEC(t2) - TIME_TO_SEC(t1))
> >>
> >>
> >> >
> >> >I am trying to do all of this from PHP, so if you happen to know of a way
> >> >to make it do the subtraction in PHP without losing all accuracy, please
> >> >let me know.
> >> >
> >> >Thanks for any help you can offer.
> >> >
> >> >Nathan Cowles
> >> >StormNet Communications
> >> >530.897.4069
> >>
> >
> >Nathan Cowles
> >StormNet Communications
> >530.897.4069
>
Nathan Cowles
StormNet Communications
530.897.4069
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