主题：[求助]两个table中查询的效率

for each dr1 As Datarow in datatables("a").Datarow

    if datatbles("b").Find("某个列 = '" & dr1("某个列") & “‘”) Is Nothing Then '如果表B没有

         dr2 = DataTables("c").AddNew

         dr2(“某列1”) = dr1("某列1")

         dr2(“某列1”) = dr1("某列1")

         dr2(“某列1”) = dr1("某列1")

    End if

next