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Construction of Universal Instances for Loop-Free Network Databases Using a Join-Like Operation

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2 Author(s)
Jajodia, S. ; Computer Science and Systems Branch, Naval Research Laboratory ; Springsteel, F.N.

In this paper, we give a polynomial-time method to construct effectively the unique universal instance, using as few nulls as possible, from any loop-free network database, via a "minimal information" extension of natural join. Our results can be seen as concretely and quickly implementing the universal relation view for databases which are not pairwise consistent.

Published in:

Software Engineering, IEEE Transactions on  (Volume:SE-13 ,  Issue: 7 )

Date of Publication:

July 1987

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