[PHP-DB] How is NULL stored?

Hi When I use phpMyAdmin to view data, where values are NULL it displays the word 'NULL'. Does this mean that the word 'NULL' is actually stored in the table, or is it defined by some other character? Is this any different from an empty value? I am using it to check to see whether a value has

Re: [PHP-DB] How is NULL stored?

When I use phpMyAdmin to view data, where values are NULL it displays the word 'NULL'. Does this mean that the word 'NULL' is actually stored in the table, or is it defined by some other character? Is this any different from an empty value? I am using it to check to see whether a value has