A Guide to the SQL Standard¶
Date, C. J., & Darwen, H. (1997). A Guide to the SQL Standard. Addison-Wesley.
Cited by¶
1 citation across 1 artifact.
Each citation links to the sentence it supports in the citing article.
Primes¶
- Empty Set
- Empty versus unknown: SQL conflated these and has argued about it ever since — the empty set is known to be empty, while an unknown value is something else entirely.
This sourceDocuments SQL's conflation of empty (known-empty result) with NULL/unknown (value-not-determined) and the long-running three-valued-logic controversy it produced.
- Empty versus unknown: SQL conflated these and has argued about it ever since — the empty set is known to be empty, while an unknown value is something else entirely.
Verification¶
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Registry ID ref:89049fb30db3 · see in the full table