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Compare data between two recordsets / lookup recordset value in another recordset

18 New Member
As the title suggets, I have created to recordsets (1: current year, 2: previous year)
I simply want to be able to do the following:
1-by-1 lookup an id/value in last year and pull the information back displaying it with Debug.Print.

from there I think i know how to write this data to an array.
Jun 27 '13 #1
17 7925
18 New Member
the code I currently have is as follows:

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  1. Function arraytest2()
  2.  Dim db As DAO.Database
  3.  Dim rst As DAO.Recordset
  4.  Dim rst1 As DAO.Recordset
  5.  Dim rst1filtered As DAO.Recordset
  7.  Dim Rowcount As Long
  8.  Dim FieldCount As Integer
  9.  Dim i As Integer
  10.  Dim j As Integer
  11.  Dim arrCount() As Variant
  13.  Set db = CurrentDb
  17.  Set rst = db.OpenRecordset("qry_Market Share", dbOpenDynaset)
  18.  Set rst1 = db.OpenRecordset("qry_Market Share1", dbOpenDynaset)
  19.  Set rst1filtered = db.OpenRecordset("qry_Market Share1", dbOpenDynaset)
  22. Rowcount = rst.RecordCount
  23. FieldCount = rst.Fields.count
  25. 'set the dimensions for the array
  26. ReDim arrCount(0 To Rowcount, 0 To 8)
  29. rst.MoveLast
  30. rst.MoveFirst
  33. Do Until rst.EOF
  35. rst1filtered.Filter = "Firmid = " & rst.Fields("Firmid").Value & ""
  36. Set rst1filtered = rst1.OpenRecordset
  40.         'write to the array
  41.         arrCount(i, 0) = rst.Fields("FirmID")
  42.         arrCount(i, 1) = rst.Fields("FirmName")
  43.         arrCount(i, 2) = rst.Fields("Perc")
  44.         arrCount(i, 3) = rst.Fields("Turnover")
  45.         arrCount(i, 4) = rst.Fields("Total")
  46.         arrCount(i, 5) = rst1filtered.Fields("FirmID").Value
  47.         arrCount(i, 6) = rst1filtered.Fields("FirmName").Value
  48.         arrCount(i, 7) = rst1filtered.Fields("perc").Value
  51.             rst.MoveNext
  52.         'see the array in the Immediate window
  53.         Debug.Print rst.Fields("FirmID"), rst.Fields("FirmName"), rst.Fields("Perc"), rst1.Fields("FirmID"), rst1.Fields("FirmName"), rst1.Fields("perc")
  54.          'Debug.Print i, arrCount(i, 0), arrCount(i, 1), arrCount(i, 2), arrCount(i, 3), arrCount(i, 4), arrCount(i, 5), arrCount(i, 6), arrCount(i, 7)
  56.         i = i + 1
  57. Loop

End Function
Jun 27 '13 #2
8,834 Recognized Expert Expert
Unless I am misinterpreting your request, create a Recordset directly from the Filter and display the results, as in:
Expand|Select|Wrap|Line Numbers
  1. Dim MyDB As DAO.Database
  2. Dim rst As DAO.Recordset
  3. Dim strSQL As String
  4. Dim intNumOfFields As Integer
  5. Dim intFldCtr As Integer
  7. 'Fictitious Value to search for
  8. Const conVALUE_TO_SEARCH As Long = 1
  10. strSQL = "SELECT * FROM tblPreviousYear WHERE [ID] = " & conVALUE_TO_SEARCH
  12. Set MyDB = CurrentDb
  13. Set rst = MyDB.OpenRecordset(strSQL, dbOpenSnapshot)
  15. rst.MoveLast: rst.MoveFirst     'For accurate Record Count
  17. intNumOfFields = rst.Fields.Count
  19. With rst
  20.   Do Until .EOF       'Return anything?
  21.     For intFldCtr = 0 To intNumOfFields - 1
  22.       Debug.Print .Fields(intFldCtr) & " | " & .Fields(intFldCtr).Value
  23.     Next
  24.       Debug.Print "--------------------------------------------------"      'Separator Bar
  25.         .MoveNext
  26.   Loop
  27. End With
  29. rst.Close
  30. Set rst = Nothing
Jun 27 '13 #3
18 New Member
Thanks for the reply. I want to search another recordset or array though. let me give you an example. I have a recordset called Athlete2013 and another recordset called Athlete 2012.
Looking at the below recordsets, I want to take Mo Farah from Recordset_Athle te2013 and search for him in Recordset_Athle te2012. Having found him, I want to to display his position. So as a final output I will have something like below. I hope this is clear. I want to be able to do this for each record in Recordset_Athle te2013.

Expand|Select|Wrap|Line Numbers
  1. Athlete    2013_position    2012_Position
  2. Mo Farah    1    2
  7. Recordset_Athlete2013
  8. Athlete    2013_position
  9. Mo Farah    1
  11. Recordset_Athlete2012
  12. Athlete    2012_Position
  13. Mo Farah    2
Jun 27 '13 #4
12,516 Recognized Expert Moderator MVP
If that's the result you wnat, there's no need for any VBA code. Just join the two recordsets on the Athlete.
Jun 27 '13 #5
18 New Member
But if I just join the recordsets on the athletes then will that not jumble up the results? E.g. Mo Farah was the winner in 2013 and runner up in 2012. If I joined the recordsets would I not have Mo Farah's 2013 score and someone else's (2012 winner) score next to it?
ASo I would have as below. But Mo was in 2nd place in 2012 and not 1st.
Athlete 2013_position 2012_Position
Mo Farah 1 1

Also the recordsets do not have the same number of records.
Jun 27 '13 #6
12,516 Recognized Expert Moderator MVP
Why would it jumble? As long as you join on the key fields, in this case Athlete, then the records will match up. If the recordsets don't have the same number of records, you can just use an outer join, be it left, right, or full outer.
Jun 27 '13 #7
5,501 Recognized Expert Moderator Expert
also sounds like the database isn't normalzied...> Database Normalization and Table Structures.
Jun 27 '13 #8
8,834 Recognized Expert Expert
I feel as though you are correct about the Data not being Normalized.

I think the question here is Does each Athlete have a Unique Identifier that is consistent in each Table?
Jun 27 '13 #9
18 New Member
I can do this by creating a query but i need to do it using vba. So i need to know the best method of going about it. By using recordsets, arrays or another method. The database is normalised. I have gathered the data for 2012 and 2013 using queries. I can create another query and do a right join on 2012 and get all corresponding records for 2012. However as i said i need to do this in vba. I have assigned 2013 query to a recordset called rst and 2012 query to another recordset called rst1 as shown in my code above. Now i need to a method that simply does the following.
For each record in recordset in rs lookup firmID in rst1. If exists then print the line using debug.print. If it doesnt exist them go to next record in recordset
Jun 27 '13 #10

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