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Update query is not performing a multiplication

Posted on 2008-06-13
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Last Modified: 2013-11-27
I need to calculate the cubic feet for a box and I'm updating my table of items.

tblmasteritem.Pallet_Cube = (([investiga.Pallet_Length]*[investiga.Pallet_Width]*[investiga.Pallet_Height])*0.000578703704)

Whenever I run this query isntead of geting the Cubic Feet I get the cubic inches
It seems that either my formula is wrong or I'm doing something inclorrectly
UPDATE tblmasteritem RIGHT JOIN investiga ON tblmasteritem.Code = investiga.Code 
SET 
tblmasteritem.Length = [Box_Outside_Length], 
tblmasteritem.Width = [Box_Outside_Width], 
tblmasteritem.Height = [Box_Outside_Height], 
tblmasteritem.Weight = [Weight_per_Box], 
tblmasteritem.Cubic_Vol = [Cubic_Vol_per_box], 
tblmasteritem.Pallet_Length = [investiga.Pallet_Length], 
tblmasteritem.Pallet_Width = [investiga.Pallet_Width], 
tblmasteritem.Pallet_Height = [investiga.Pallet_Height], 
tblmasteritem.Pallet_Cube = (([investiga.Pallet_Length]*[investiga.Pallet_Width]*[investiga.Pallet_Height])*0.000578703704), tblmasteritem.HoraActualiza = Now();

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Question by:TOPIO
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Expert Comment

by:omgang
ID: 21783205
what units are the length, width and height in?
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Author Comment

by:TOPIO
ID: 21783213
inches.
And according Mr Google
1 cubic inches = 0.000578703704 cubic feet
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Expert Comment

by:Rey Obrero (Capricorn1)
ID: 21783242
that is correct  ~ approximately

the values are in inches  12"

12 * 12 * 12 * 0.000578703704  = 1.000000000512  cubic ft
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Expert Comment

by:omgang
ID: 21783245
The math looks correct to me.  12 in. x 12 in. x 12 in. x 0.000578703704 = 1 cu. ft.

If the units for length, width and height were actually in feet instead of inches you would be getting the result you are seeing
12 ft. x 12 ft. x 12 ft. x 0.000578703704 = 1278

I don't see anything wrong with the query either.
OM Gang
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Author Comment

by:TOPIO
ID: 21783253
Therein lies the question dear om gang the query is correct the formula is correct so why in the name of the frosted miniwheats is this not working?

Any ideas?
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Expert Comment

by:omgang
ID: 21783268
Not to insult but are you sure the units in table investiga are inches?  For a pallet I would imagine values such as
length = 48
width = 42
height = 48

OM Gang
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by:OnALearningCurve
ID: 21784607
TOPIO,

Can you post some example values you are putting in and getting out as a result?

for example:

l=12, h=48, w=12, Result=###

Cheers,

Mark.
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Accepted Solution

by:
GRayL earned 500 total points
ID: 21789570
As you are using Property names (Length, Width, Height)  for field names, you may get some cross talk.  If you can try using the same Name as the source - [Box_Outside_Length] in lieu of Length
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by:GRayL
ID: 21835042
Thanks, glad to help.
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