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# finding minimum value <> 0

Posted on 2004-08-14
Medium Priority
403 Views
Im sure this is a easy one but i cannot figure it out....

how do I find the minimum value of a field not equal to zero?

Thanks
0
Question by:cwagner17
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LVL 42

Expert Comment

ID: 11800922
You can't use the min() summary because this will return the minimum whether or not it's equal to zero.  Instead you'll have to create a couple of formulas.

In the report header create this formula:

shared numberVar SmallestFound := 99999;

In the details section create this formula:

if {table.field} > 0 and {table.field} < shared numberVar SmallestFound then
shared numberVar SmallestFound := {table.field};

Finally wherever you want to know the smallest value (report footer?) simply create this formula:

shared numberVar SmallestFound;

HTH

frodoman
0

LVL 1

Author Comment

ID: 11801063
ok that helped a little bit....

for every incident I track which trucks responded. I want to find out which truck responded first based on time. the time is stored as a number. When i use the above formula it finds all the vehicles and adds the time together. when i view it in the details section it shows each truck.

I don't know why it is showing all of them.

i created a group incapps.idnumber

my tables are as follows:

in5basic.incidentnumber
incapps.alarmtime
incapps.enroutetime

Thanks
0

LVL 42

Accepted Solution

frodoman earned 200 total points
ID: 11802609
So what you want is the lowest value within each group, right?  In that case do this:

In the report header create this formula:

shared numberVar SmallestFound;

In the group header create this formula (just use a value larger than anything you'll see in your report):

shared numberVar SmallestFound := 99999;

In the details section create this formula:

if {table.field} > 0 and {table.field} < shared numberVar SmallestFound then shared numberVar SmallestFound := {table.field};

In the group footer put this formula:

shared numberVar SmallestFound;

You can suppress any of these formula so they aren't visible on the report.

HTH

frodoman
0

LVL 1

Author Comment

ID: 11802686
Thanks alot, i've been banging my head against the keyboard for awhile on this one.
0

LVL 42

Expert Comment

ID: 11805000
0

LVL 1

Author Comment

ID: 11817255
one more thing......

how do i have it ignore the field if there is nothing in it. it seems to be causing a problem if every one doesn't have a time in it.

thanks
0

LVL 42

Expert Comment

ID: 11820055
check for isNull({field}) first...

if not isNull({table.field}) then
(
if {table.field} > 0 and {table.field} < shared numberVar SmallestFound then shared numberVar SmallestFound := {table.field};
)
0

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