Is there ever a time where using a database 1:1 relationship makes sense?

Is there ever a time where using a database 1:1 relationship makes sense?

sql database-design one-to-one database-normalization

sql

Facebook database design?

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When to Denormalize a Database Design

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sql

Normalization in plain English

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Polymorphism in SQL database tables?

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sql

How to implement a catalogue for meta-data and automating SQL in a database?

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sql

How far to take normalization? [closed]

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unnecessary normalization

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sql

Normalizing an extremely big table

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sql

Data normalization and writing queries

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What is atomicity in dbms

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sql