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If IsNull(DLookUp("[ID]","t1","[Str]='" & t2!Stroka & "'") then recordset.addnew else recordset.edit end if
.FindFirst "[Str]='" & t2!Stroka & "'" If .nomatch then .addnew else .edit end if
Set stbl = OpenForSeek("t1") stbl.Index = "Str" stbl.Seek "=", t2!Stroka If stbl.NoMatch Then....
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http://www.sql.ru/forum/1072991/skorost-poiska-v-rekrodsete-po-stroke