用vba实现数据的查询功能，类似vb 的adodb 控件，可使用sql语句，很好用。       

     用到的一个比较好的例子：

On Error Resume Next
    Application.ScreenUpdating = False  ‘关闭屏幕更新,加快程序运行
    Dim i As Integer
    Dim kcmc As String
    Dim CNN As New ADODB.Connection
    Dim rs As New ADODB.Recordset
    Dim mySheet As String
    Dim n As Integer
    Dim SQL As String
    mySheet = Worksheets(“补考名单”).Name   ‘工作表名
    Dim myWbName As String
    myWbName = ThisWorkbook.FullName     ‘工作簿名
    Dim cnnStr As String
      Set ws = Worksheets(“补考科目及学生名单”)
    ws.Visible = True
    ws.Cells.Clear
    cnnStr = “Provider=microsoft.jet.oledb.4.0;” _
        & “Extended Properties=Excel 8.0;” _
        & “Data Source=” & myWbName
    CNN.Open cnnStr
   kcmc = ComboBox1.Value
   ‘kcmc = “单片机接口与技术”
    ‘查询语句
    SQL = “select * from [” & mySheet & “$] where 课程名称='” & kcmc & “‘ order by 学号  ASC”
    rs.Open SQL, CNN, adOpenKeyset, adLockOptimistic
    n = rs.RecordCount ‘查询该课程的补考人数
    rss = n
    ws.Activate
    Application.ScreenUpdating = False
    MyColshu = rs.Fields.Count  ‘工作表头列数
    For i = 1 To rs.Fields.Count
        ws.Cells(1, i) = rs.Fields(i – 1).Name
    Next i
    ws.Range(“A2”).CopyFromRecordset rs
    Columns(“A:IV”).Columns.AutoFit   ‘最适合列宽
    Range(“A1”).Select
hhh:
    rs.Close
    CNN.Close
    Set rs = Nothing
    Set CNN = Nothing
    Set ws = Nothing
    Application.ScreenUpdating = True