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# Deleting Data from MySQL Database

Data can be deleted from MySQL tables by executing SQL DELETE statement through PHP function mysql_query.

Below is a simple example to delete records into employee table. To delete a record in any table it is required to locate that record by using a conditional clause. Below example uses primary key to match a record in employee table.

## Example:

Try out following example to understand delete operation. You need to provide an employee ID to delete an employee record from employee table.

    <html>
    <head>
    <title>Delete a Record from MySQL Database</title>
    </head>
    <body>

    <?php
    if(isset($_POST['delete']))
    {
    $dbhost = 'localhost:3036';
    $dbuser = 'root';
    $dbpass = 'rootpassword';
    $conn = mysql_connect($dbhost, $dbuser, $dbpass);
    if(! $conn )
    {
      die('Could not connect: ' . mysql_error());
    }

    $emp_id = $_POST['emp_id'];

    $sql = "DELETE employee ".
           "WHERE emp_id = $emp_id" ;

    mysql_select_db('test_db');
    $retval = mysql_query( $sql, $conn );
    if(! $retval )
    {
      die('Could not delete data: ' . mysql_error());
    }
    echo "Deleted data successfully\n";
    mysql_close($conn);
    }
    else
    {
    ?>
    <form method="post" action="<?php $_PHP_SELF ?>">
    <table width="400" border="0" cellspacing="1" cellpadding="2">
    <tr>
    <td width="100">Employee ID</td>
    <td><input name="emp_id" type="text" id="emp_id"></td>
    </tr>
    <tr>
    <td width="100"> </td>
    <td> </td>
    </tr>
    <tr>
    <td width="100"> </td>
    <td>
    <input name="delete" type="submit" id="delete" value="Delete">
    </td>
    </tr>
    </table>
    </form>
    <?php
    }
    ?>
    </body>
    </html>

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