Question

我正在使用手动创建的表Products的空副本，我将其命名为Products_Backup。我想要做的是将“Spices”类别的产品中的每隔一行插入到这个空的Products_Backup表中，因为总共12行中只有6行，这些行位于“Spices”类别下的Products表中。问题是我不知道该怎么做。我尝试将MOD运算符用于新创建的ProductID，但我的导师告诉我这不是一个合适的解决方案，因为他可以轻松更改此ProductID的值，我会得到奇数行而不是偶数。

    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

因此，我可以将所有12条记录插入Products_Backup，MsgBox告诉我何时插入了第10条记录。但我仍然不知道如何将每隔一行插入Products_Backup以获得6条记录。

Answer 1

Dim booEveryOther as Boolean
booEveryOther = False

While Not rst.EOF
   If booEveryOther Then
      s1 = "INSERT INTO ...
   End If

   booEveryOther = Not booEveryOther

只需使用每个新记录设置为Not的布尔值。

Answer 2

我认为这应该做得更好

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

将每个OTHER ROW从一个表插入另一个表（VBA MS Access 2010）

2 个答案: