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The Concept of Cardinal Reciprocity- A Primer

Too many authors in the field of relational theory have neglected the concept of Cardinal Reciprocity. This can cause a number of subtle problems with database design in terms of its derivability, redundancy, and consistency. . Increasingly, this little-understood aspect of relational theory, that emphasises the cardinality of the attributes of tuples in a relation and the reciprocity with isomorphic foreign key restraints, is becoming a hot forum topic.

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Running SQLCMD II

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Question of the Day

Running SQLCMD II

I run this command to start SQLCMD:

sqlcmd -S localhost -E -c "proceed"
At the prompt, I type this (the 1> and 2> are prompts):
1> select @@version
2> go
What happens?

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