In a One to One relationship should i drop one of the table's id column?

Posted by Vlad on Stack Overflow See other posts from Stack Overflow or by Vlad
Published on 2010-06-16T09:51:42Z Indexed on 2010/06/16 9:52 UTC
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Filed under:

mysql

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database-design

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normalization

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relational-database

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one-to-one

I have the following 2 tables in MySQL: Customer(Id, Firstname, Lastname...) Bonus(Id, CustomerId, Value, ...)

The relation is One-To-One, every customer has only one bonus.(the CustomerId is unique in the Bonus Table)

Q: Should I drop the Id column of the Bonus table? (I want to know why or why not)

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