Insert & Delete my SQL Queries

SQL commands are instructions used to communicate with the database to perform specific task that work with data. Some categories of commands used in SQL to perform various functions.  SQL commands can be used not only for searching the database, tables but also to perform various other functions like, create the tables, add the data to tables, or modify the data, drop the table and set permissions for users. Two query commands of SQL are following there:

 INSERT and DELETE queries in PHP which are commonly used ?

INSERT QUERY 

<?php

if(isset($_POST['sub']))

{

      $title = mysql_escape_string($_POST['title']);

                $sql="insert into news (`title`) values('$title')";

                $result=mysql_query($sql);

                if($result)

                {

            echo"sucessfully added";

                }

                else

                {

                                echo" error adding news";

                }

}

DELETE QUERY

if(isset($_GET['delete'])){

                // get row id to be deleted and query delete

                $id = (int)$_GET['delete'];

                if(mysql_query("delete from `news` where `id`='$id'"))

      {

                                echo 'News deleted successfully.';

                }

else

      {

                                echo 'Unable to delete row';

      }

}