主题：一个关于全TABLE 的搜索的问题

用SQL语句，例如：

Dim cmd As New SQLCommand
Dim dt As DataTable
cmd.Connection Name = "数据源名称"
cmd.CommandText = "SELECT DISTINCT 客户 From {订单}"
dt = cmd.ExecuteReader()
For Each dr As DataRow In dt.DataRows
   output.show(dr("客户"))
Next