Dim cmd As New SQLCommand Dim dt As DataTable cmd.ConnectionName = "region" cmd.CommandText = "SELECT DISTINCT 省,市县,区号,邮编 From {行政区域}" dt = cmd.ExecuteReader()
当要二次引用这个得到的dt时要怎么表达才正确的问题?(我现在只能是用两个sql语句合在一起用)
cmd.CommandText = "SELECT DISTINCT 省,市县,区号,邮编 From {dt}"