More than one credit card per account

I'm implementing an开发者_Python百科 ATM simulator using databases. The bank accounts that i'm holding have ( or not ) to be associated with more than only one credit card, each. I know how to associate it with only one credit card each, by storing the credit card id in a field, but i don't know how to make it work if more than one credit card have access to a specific bank account.

What should i be looking for ?

BTW, i'm doing it in SQLite.

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Number of bank account in each credit card.

You must have bank account in credit card structure, not credit card structure in bank account structure, because credit card is linked to account not account to credit card!