NULL
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special marker and keyword in SQL indicating that something has no value
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- short name
- NULL
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Connections
three-valued logic
Entity
Christopher J. Date
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Q47607
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relational database
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Edgar F. Codd
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data definition language
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data manipulation language
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closed-world assumption
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SQL-92
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International Standard Book Number
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database
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Wayback Machine
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digital object identifier
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Ω/ω
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Q850
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computing
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empty set
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JSTOR
Organization
propositional calculus
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PostgreSQL
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