public function executeQuery($sql)
    {
        $result = $this->connection->query($sql);
        $this->errno = $this->connection->errno;
        $this->error = $this->connection->error;
        if($this->connection->errno) {
            echo 'Query Error ['.$this->errno.'] : '.$this->error.' : '.$sql;
        }
        if($this->errno == 1054) {
            echo 'Table not set properly in query';
        }
        return $result;
    }
public function executeQuery($sql)
    {
        $result = $this->connection->query($sql);
        $this->errno = $this->connection->errno;
        $this->error = $this->connection->error;
        if($this->connection->errno) {
            echo 'Query Error ['.$this->errno.'] : '.$this->error.' : '.$sql;
        }
        if($this->errno == 1054) {
            echo 'Table not set properly in query';
        }
        return $result;
    }
public function executeQuery ( $ sql ) { $ result = $ this -> connection -> query ( $ sql ) ; $ this -> errno = $ this -> connection -> errno ; $ this -> error = $ this -> connection -> error ; if ( $ this -> connection -> errno ) { echo 'Query Error [' . $ this -> errno . '] : ' . $ this -> error . ' : ' . $ sql ; } if ( $ this -> errno == 1054 ) { echo 'Table not set properly in query' ; } return $ result ; }
Run sql query.

@param   string  $sql
@return  mysqli_result
Run sql query .