Inserting every OTHER ROW from one table to another (VBA MS Access 2010) - sql

Question

I am working with manually created empty copy of table Products, which I named Products_Backup. What I want to do is to insert every other row from "Spices" category of products into this empty Products_Backup table, since there would be only 6 rows from total of 12 rows, that are in Products table under "Spices" category. The problem is that I don't know how to do that. I tried to use MOD operator for newly created ProductID, but my mentor told me that it is not a proper solution, since he could easily change this ProductID's value and I would get odd rows instead of even.
Private Sub CommandButton0_Click()
Dim db As Database, rst As Recordset
Dim I As Integer, s, s1 As String
Set db = CurrentDb
s = "SELECT Products.* FROM Products WHERE (((Products.CategoryNumber)=2));" ' This value is for Spices
Set rst = db.OpenRecordset(s)
I = 1
While Not rst.EOF
s1 = "INSERT INTO Products_Backup (ProductName, ProductID, CategoryNumber, OrderedUnits) VALUES ('" & rst!ProductName & "', " & I & " , '" & rst!CategoryNumber & "', '" & rst!OrderedUnits & "');"
MsgBox ("Record inserted")
db.Execute s1
I = I + 1
rst.MoveNext
If I Mod 10 = 0 Then
MsgBox ("Inserted " & I & ".record")
End If
Wend
rst.Close
db.Close
End Sub
So with this I can insert all 12 records into Products_Backup, with MsgBox telling me when 10th record was inserted.
But I still have no idea what to do to insert every other row into Products_Backup to get 6 records.

Answer 1

Dim booEveryOther as Boolean
booEveryOther = False
While Not rst.EOF
If booEveryOther Then
s1 = "INSERT INTO ...
End If
booEveryOther = Not booEveryOther
Just use a Boolean value that is set to Not itself with every new record.

Answer 2

i think this should do it better
While Not rst.EOF
s1 = " INSERT INTO Products_Backup (ProductName, ProductID, CategoryNumber, OrderedUnits) " & _
" VALUES ('" & rst!ProductName & "', " & I & " , '" & rst!CategoryNumber & "', '" & rst!OrderedUnits & "');"
db.Execute s1
If I Mod 10 = 0 Then
MsgBox ("Inserted " & I & ".record")
Else
MsgBox ("Record inserted")
End If
I = I + 1
rst.MoveNext
Wend