For instance, a common use of a database system is to track information about users, their name, login information, various addresses and phone numbers. In the navigational approach all of this data would be placed in a single record, and unused items would simply not be placed in the database. In the relational approach, the data would be normalized into a user table, an address table and a phone number table (for instance). Records would be created in these optional tables only if the address or phone numbers were actually provided.
একটি ন্যাভিগেশনাল সিস্টেমে ফাঁকা ডেটা ক্ষেত্রগুলির কী হয়?
not be placed in the database