select code,name,address,total1,counttotal,sumprice,counttotal*sumprice as totalprice from datatb
WHERE (Name LIKE '%".$_GET["txtKeyword"]."%' or Code LIKE '%".$_GET["txtKeyword"]."%' or Date LIKE '%".$_GET["txtKeyword"]."%' or Unit1 LIKE '%".$_GET["txtKeyword"]."%' )"