Insert w/o function

<?php

/*

Template Name: myTemp

*/





		global $wpdb;


		if ( isset( $_POST['address'] ) && $_POST['address'] != '') {
			 $address = $_POST['address'];
		}

		// grab the table if exist or build and store in var
		$address_table = $wpdb->prefix . "address_table";

		$wpdb->insert($address_table, array('address' => $address),array('%s'));


  	         if( isset($address) && $address != '' ) {

			echo 'Thank you, address has been submitted';

		 }
?>

 	 <form method="post" action="" id="insertForm" name="insertForm">
          <input type="text" value="" placeholder="enter text" id="address" name="address">
          <input type="submit" value="submit">
         </form>