Home » Developer & Programmer » Designer » Primary keys in child tables (Oracle
Primary keys in child tables [message #312637] Wed, 09 April 2008 08:57 Go to next message
Messages: 6
Registered: April 2008
Location: London, UK
Junior Member
Can you give me your thoughts on the following proposition: "A primary key on a child table is superfluous"
Re: Primary keys in child tables [message #312764 is a reply to message #312637] Wed, 09 April 2008 13:29 Go to previous message
Messages: 7880
Registered: March 2000
Senior Member
In a relational database, each and every tuple needs a unique identifier.

Just my opinion; no idea if it's backed by any theory.
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