2011年4月11日 星期一

SQL to Excel 三种方法

來源
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  方法1。使用CopyFromRecordset(适用于Access,SQL)
  第一次:49
  第二次:45
  第三次:43
  第四次:43
  第五次:42
  方法2:使用QueryTable(适用于Access,SQL)
  第一次:10
  第二次:6
  第三次:3
  第四次:4
  第五次:4
  方法3:使用bcp(适用于SQL)
  从命令行直接运行时间为701毫秒,从VB中返回时间为0
  测试代码如下:
  方法1:
  Option Explicit
  Private Sub Command1_Click()
   Dim t1 As Date
   t1 = Now()
  
  
   Dim strConn As String
   strConn = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist
  Security Info=False;Initial Catalog=mlog;Data Source=SZ09"
  
   Dim cn As ADODB.Connection
   Dim rs As ADODB.Recordset
  
  
   Set cn = CreateObject("ADODB.Connection")
   cn.Open strConn
   cn.CursorLocation = adUseServer
   Set rs = cn.Execute("table1", , adCmdTable)
  
   Dim oExcel As Excel.Application
   Dim oBook As Excel.Workbook
   Dim oSheet As Object
   Set oExcel = CreateObject("Excel.Application")
   Set oBook = oExcel.Workbooks.Add
   Set oSheet = oBook.Worksheets(1)
  
   oSheet.Range("A1").CopyFromRecordset rs
  
   oBook.SaveAs "d:\1.xls"
   oExcel.Quit
   Set oSheet = Nothing
   Set oBook = Nothing
   Set oExcel = Nothing
  
   rs.Close
   Set rs = Nothing
  
   cn.Close
   Set cn = Nothing
  
   MsgBox (DateDiff("s", t1, Now()))
  
  End Sub
  方法 2:
  Option Explicit
  Private Sub Command1_Click()
   Dim t1 As Date
   t1 = Now()
  
   'Create a new workbook in Excel
   Dim oExcel As Object
   Dim oBook As Object
   Dim oSheet As Object
   Set oExcel = CreateObject("Excel.Application")
   Set oBook = oExcel.Workbooks.Add
   Set oSheet = oBook.Worksheets(1)
  
   Dim strConn As String
   strConn = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist
  Security Info=False;Initial Catalog=mlog;Data Source=SZ09"
  
   'Create the QueryTable
  
   Dim oQryTable As Object
   Set oQryTable = oSheet.QueryTables.Add( _
   "OLEDB;" & strConn & ";", oSheet.Range("A1"), "Select * from table1")
   oQryTable.RefreshStyle = xlInsertEntireRows
   oQryTable.Refresh False
  
   'Save the Workbook and Quit Excel
   oBook.SaveAs "d:\1.xls"
   oExcel.Quit
   Set oSheet = Nothing
   Set oBook = Nothing
   Set oExcel = Nothing
  
   MsgBox (DateDiff("s", t1, Now()))
  End Sub
  方法3:
  Private Sub Command1_Click()
   Dim t1 As Date
   t1 = Now()
  
   Dim sCmd As String
   sCmd = "bcp mlog..table1 out d:\1.csv -w -t , -r \n -S sz09 -P
  kenfil"
   Dim WSH As Object
   Set WSH = CreateObject("WScript.Shell")
   WSH.Run sCmd, True
  
   MsgBox (DateDiff("s", t1, Now()))
  End Sub
  Note: cvs本身是一个可以被excel使用的文件(你可以直接在excel中打开这个文
  件),如果你希望将这个文件转换成xls文件,很简单:
   Dim oExcel As Object
   Dim oBook As Object
   Dim oSheet As Object
   Set oExcel = CreateObject("Excel.Application")
  
   Set oBook = oExcel.Workbooks.Open("d:\1.csv")
  
   'Save as Excel workbook and Quit Excel
   oBook.SaveAs "d:\1.xls", xlWorkbookNormal
   oExcel.Quit(王朝网络 wangchao.net.cn)
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