I have 3 dropdowns in my html form for submitting year, month and day values. However, i have only one date column in my db. Can anybody show me how to achieve this using php, and to submit the date in the yyyy-mm-dd format. Thanks for the help, in advance.

dreamweaver 8.0.2; php-mysql server model;
Apache 2.2.3
PHP 5.1.6
MySql 5.0.24a