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procedure TForm1.Button8Click(Sender: TObject);
var
q4,q5: TQuery;
str:string;
begin
Database1.Connected := true;
q4:= Tquery.Create(nil);
q4.DatabaseName := database1.DatabaseName;
with q4 do
begin
str:= 'select count(distinct qshm) as total_title from t_inv_title';
Close;
SQL.Clear;
SQL.Add(str);
Edit1.Text:=fieldbyname('total_title').AsString;
Open;
end;
end;