Duplication of keys like name and address in {"name": "Test", "address": "1234 Main St."} - it will have name and address in each record, whereas in SQL it isn'

Duplication of keys like name and address in {"name": "Test", "address": "1234 Main St."} - it will have name and address in each record, whereas in SQL it isn't in the data, although it's in the queries.