Смущает в конкатенации phpmysql

Question

У меня есть скрипт вроде:

$sLimit = "";
        if ( isset( $_POST['iDisplayStart'] ) && $_POST['iDisplayLength'] != '-1' )
        {
                $sLimit = "LIMIT ".mysql_real_escape_string( $_POST['iDisplayStart'] ).", ".
                        mysql_real_escape_string( $_POST['iDisplayLength'] );
        }


if ( isset( $_POST['iSortCol_0'] ) )
        {
                $sOrder = "ORDER BY ";
                for ( $i=0 ; $i<intval( $_POST['iSortingCols'] ) ; $i++ )
                {
                        if ( $_POST[ 'bSortable_'.intval($_POST['iSortCol_'.$i]) ] == "true" )
                        {
                                $sOrder .= $aColumns[ intval( $_POST['iSortCol_'.$i] ) ]."
                                        ".mysql_real_escape_string( $_POST['sSortDir_'.$i] ) .", ";
                        }
                }

                $sOrder = substr_replace( $sOrder, "", -2 );
                if ( $sOrder == "ORDER BY" )
                {
                        $sOrder = "";
                }
      }


$sGroupBy = " GROUP BY A.Range_sampling, A.Lot_no ";
                $sQuery = "SELECT SQL_CALC_FOUND_ROWS DATE(A.Inspection_datetime) AS Date, A.Line, A.Model, 
                                  A.Lot_no,A.Range_sampling,COUNT(A.Serial_number) AS Error,B.name AS PIC
                           FROM inspection_report A
                           LEFT JOIN Employee B
                           ON A.NIK=B.NIK
                           WHERE CHAR_LENGTH( A.Range_sampling ) < 17
                           AND MONTH(A.Inspection_datetime)=MONTH(CURRENT_DATE)" .$sGroupBy.$sOrder.$sLimit; //error
        $rResult = mysql_query($sQuery) or _doError(_ERROR30 . ' (<small>' . htmlspecialchars($sql) . '</small>): ' . mysql_error() );

для этого скрипта я получил ошибку:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '0, 10' at line 7

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после добавления пробела:

Error message is :: "Error occuered during query execution: (<small></small>): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'desc LIMIT 0, 10' at line 8";

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Полный запрос:

SELECT SQL_CALC_FOUND_ROWS DATE(A.Inspection_datetime) AS Date, A.Line, A.Model, A.Lot_no,A.Range_sampling,COUNT(A.Serial_number) AS Error,B.name AS PIC FROM inspection_report A LEFT JOIN Employee B ON A.NIK=B.NIK WHERE CHAR_LENGTH( A.Range_sampling ) < 17 AND MONTH(A.Inspection_datetime)=MONTH(CURRENT_DATE) GROUP BY A.Range_sampling, A.Lot_no ORDER BY desc LIMIT 0, 10

Answer 1

Попробуйте поставить несколько пробелов в начале и конце строк, таких как «ORDER BY» и «LIMIT».

Также покажите нам окончательное значение ошибочной переменной sQuery.

Теперь у вас нет поля в предложении ORDER BY:

ORDER BY desc LIMIT 0, 10

Между BY и desc должно быть имя поля, по которому вы сортируете