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When redesigning a database, how can we check assumptions about functional dependencies?
Clement
Clement
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2 days ago
When redesigning a database, how can we check assumptions about functional dependencies?
When redesigning a database, how can we check assumptions about functional dependencies?
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Download Study Guide
Database Processing: Fundamentals, Design, and Implementation
Edition:
15
th
Authors:
Kroenke, Auer, Yoder, Vandenberg
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Niquegirl21!
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#1
2 days ago
There are two related SQL techniques that we can use to check assumptions about functional dependencies in an existing database. The first is to use a correlated subquery with the SQL IN keyword, and the second is to use a correlated subquery structure using the SQL EXISTS and/or NOT EXISTS keywords.
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Clement
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2 days ago
Appreciate the effort, thank you!
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Niquegirl21!
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2 days ago
You're very welcome ... please mark the topic solved when you get a chance
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