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StrSQL="SELECT Max(SaleTicketNo) as salesticketno from tabSaleList WHERE saledate=2010-4-14"
Set SaleRS = SaleMDB.OpenRecordset(StrSQL, dbReadOnly)

Èç¹û²éѯ³öÀ´Ã»ÓÐÖµ ÔÚµ÷ÊÔµÄʱºò¿´¼ûSaleRS("salesticketno")µÄ½á¹ûÊÇNull ÎÒ¼ÓÉÏÅжÏÌõ¼þ
If Not SaleRS.EOF Then
  If SaleRS("salesticketno") = Null Then
  TicketedNo = "000001"
  Else
  TicketedNo = SaleRS("salesticketno")
  End If
  End If

Ϊʲô If SaleRS("salesticketno") = Null Õâ¸öÌõ¼þÊDz»³ÉÁ¢µÄ°¡? ÄÇÓ¦¸ÃÔõôÅжϰ¡?
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