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如何确定有多少人登陆数据库

如何确定有多少人登陆数据库

  Sub ShowUserRosterMultipleUsers()

   Dim cn As New ADODB.Connection

   Dim cn2 As New ADODB.Connection

   Dim rs As New ADODB.Recordset

   Dim i, j As Long

    

   cn.Provider = "Microsoft.Jet.OLEDB.4.0"

   cn.Open "Data Source=c:\Northwind.mdb"

  

   cn2.Open "Provider=Microsoft.Jet.OLEDB.4.0;" _

  

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