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Database Design Help for Historical Analysis

I'm trying to create a form in my database that will show historical information on part number purchasing. I have a query that is linked to my SQL tables in my ERP system. The query shows rows for each receipt of material. What I'm looking to do is create a form that a user can select a part number from a combo box and also a starting month from another combo box and that have it show the receipt quantity per month from the starting month that was selected to the current month. The max # of months I want to show is 24 months. So how would I create the controls on the form or structure them to be able to show 24 months after a starting month is selected? I need some help/ideas on how to construct this form. Any ideas would be greatly appreciated. I'm trying to make it as simple as possible and without having any performance issues trying to gather all this data onto 1 form. Just need some input/ideas or even samples.
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Lawrence Salvucci
Asked:
Lawrence Salvucci
1 Solution
 
pdebaetsCommented:
You can do this with a form with criteria fields and a list box that displays your results, or a subform that displays the results. I would recommend the latter.

You can use the DateAdd function to find a date 24 months after a given starting date. Ex.:

dim dteStartingDate as Date
dteStartingDate = #1/1/2000#
debug.print dateadd("m",24,dteStartingDate)

You can build an SQL statement for your subform from the criteria entered. Ex.:

dim strSQL as string
strSQL = ""
strSQL = strSQL & "Select "
strSQL = strSQL & "    * "
strSQL = strSQL & "  From "
strSQL = strSQL & "       MyTable "
strSQL = strSQL & "  Where "
strSQL = strSQL & "      MyTableField =  " & Forms!MyFormName!MyCriteriaControl
strSQL = strSQL & "     AND "
strSQL = strSQL & "      MyOtherTableField =  " & Forms!MyFormName!MyOtherCriteriaControl
strSQL = strSQL & ";"

You can set the recordsource of your subform like so

Forms!MyFormName!MySubformControlName.Form.recordsource = strSQL
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