here is my situation:
i have a prepay online store and i advertised a contest to win a free code when buying at least 5 codes during 24.11-24.12 2008 period.
now this is my table:
orders_id customers_id customers_name customers_company customers_street_address customers_suburb customers_city customers_postcode customers_state customers_country customers_telephone customers_email_address customers_address_format_id delivery_name delivery_company delivery_street_address delivery_suburb delivery_city delivery_postcode delivery_state delivery_country delivery_address_format_id billing_name billing_company billing_street_address billing_suburb billing_city billing_postcode billing_state billing_country billing_address_format_id payment_method cc_type cc_owner cc_number cc_expires last_modified date_purchased orders_status orders_date_finished currency currency_value
i don't have a sql logic to : select all orders depending on date_purchased field which is in '2008-11-21 21:47:45' format, then calculate total number of orders for each of the customers in that period, depending on customers_id and orders_id i guess, then make a list of the customers that have the number of orders above or equal to 5 and finally randomly select one.