sql - Database design, which table has the foreign key -

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मेरे पास एक टेबल USER (USER_ID, PASSWORD, NAME, ...) और एक तालिका है उपयोगकर्ताओं के लिए ACCESS_ROLES , प्रत्येक उपयोगकर्ता के पास एक ACCESS_ROLE (ONE-to-ONE) हो सकता है।

किस तालिका में विदेशी कुंजी है?
मैं USER_ID को ACCESS_ROLES तालिका में डालूंगा क्या कोई सर्वोत्तम अभ्यास दृष्टिकोण है?

चूंकि आप एक-से-एक रिश्ते करेंगे फिलिप केली द्वारा सुझाए गए समाधान बेहतर है बस USER नामक access_role_id में एक नया कॉलम जोड़ें और फिर इस तरह से USER तालिका पर विदेशी कुंजी करें: 

  वैकल्पिक टैब उपयोगकर्ता जोड़ें सम्मिलित करें fk_access_roles_users विदेशी कुंजी (access_role_id) संदर्भ ACCESS_ROLES (access_role_id);

USER_ID में ACCESS_ROLES तालिका में न जोड़ें। जैसा कि आपने सुझाव दिया है।


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