Hello everyone. I'm new to database design and drawing a rookie blank on this idea.
I'm trying to figure out how to (if I need to) build a MAILING_LIST relation based on these rules:
1) a Customer can choose if they want to receive a monthly catalog
2) the company can create a mailing list of those who want monthly catalog, to save on sending un-necessary copies to people who don't want them.
Do I need to create a separate entity for MAILING_LIST, or would it be enough to simply have a Boolean option with say the name Cust_Mailing_List , and then the client could print list simply from this attribute?