Coping with Ingredients
Date: Thu, 13 Jun 2002 05:27:25 +1000
Message-ID: <ae87k5$qto$1_at_perki.connect.com.au>
I am applying a surface finish to industrial floors. To an Ingredients table, I add Material and Application Rate. From this (knowing the area) I can calculate the Quantity of each material needed. My problem is where a material does not have its own application rate, but is a percentage of another Material. I don't know how to calculate the quantity of all materials and end up with this info in 'one' calculated field of a query. I believe I need it in just one field so I can later use it in Reports (total job cost, cost of jobs done for Month etc).
Can anyone help?
tblMaterials
tblSection (contains properties of the section of the building)
SectID (pk)
tblIngredients
This is what the structure looks like:
MatID (pk-autonum)
MatName etc
Description
FloorArea etc
IngID (pk-autonum)
SectionID (fk 1-M)
MatID (fk 1-M)
So ingredient data would look like:
IngID SectID MatID AppRate
1001 12 38 0.25 (L/square meter) 1002 12 26 2 (kg/square meter)
Material 38 might be a primer, 26 a resin compound.
Knowing the area (say 100 square meters), the Qty is just Area*AppRate. Easy.
But now I need to add a pigment whose quantity is 1% of the Qty of Resin. This doesn't fit
into my table.
I tried making another table for additives
tblAdditives
IngID (fk 1-M)
MatID (fk with tblMaterials 1-M)
Percentage
But then when querying the Ingredients and Additives, I got two Qty columns, and I don't know how to get one column of ingredient quantities (an additive is a kind of ingredient).
Your help in this matter is appreciated. Graham Received on Wed Jun 12 2002 - 21:27:25 CEST