mysql - DELETE SQL operation with PHP -


i have problem sql delete in php language. don't know problem delete sql operation. me, please?

the code is:

$query = mysqli_query($connessione, "select * (select date, time, temperature streamcopy moteid = '".$sensor."' , concat(date, ' ',time) between '".$i."' , '".$f."' order date desc, time desc) tab order date, time");  $n = 0; $m = 0; while($row = mysqli_fetch_array($query)){     if($n == 0){         $num = $row['temperature']; //ok         $n = $n+1;     }     else{         $temp[$m] = $row; //ok         if(abs($num - $temp[$m]['temperature'])<0.5){ //ok             $queryfixed = mysqli_query($connessione, "delete streamcopy moteid = '".$sensor."' , temperature = '".$temp[$m]['temperature']."' , date = '".$temp[$m]['date']."' , time = '".$temp[$m]['time']."')"); /* elimina dati di temperatura k vicini */             $n = $n+1;             $m = $m+1;         }         else{             $num = $temp[$m]['temperature'];             $n = $n+1;             $m = $m+1;         }     } }


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