Section
7 pages
Data-Integrity
Foreign Keys Are Not Optional
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Joins That Lie: The Cardinality Problem
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Null in Sql: Three Valued Logic and the Silent Bug Factory
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Polymorphic References Are Not Foreign Keys
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Schema Conventions Don't Survive Without Automation
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Uniqueness and Selectivity: The Two Numbers That Drive Query Plans
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Where Business Logic Lives Database vs. Application
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