Explains candidate key and prime attribute
https://knobit.org/id/knobit/K-552
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| Context functions | Object understanding |
|---|---|
| Knobit creation methods | AI generated |
| Knobit creation methods | AI generated, AI edited |
| Knobit types | Knowledge |
| LCG purposes | Assessing the learner's knowledge or skill state |
| LCG purposes | Opening up a learning outcome |
| action verb | Explains en |
| assessment criterion | Finds every candidate key of a sample entity from its dependencies and classifies its attributes as prime or non-prime en |
| assessment method | Written question with sample entities en |
| conforms to profile | https://oppekava.edu.ee/a/Knobitite_kirjeldamise_ja_seostamise_reeglid#LCG-KNOBIT-0.1 |
| dcterms:identifier | K-552 |
| dcterms:identifier | Q-281 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Normalisation theory and relational design (Codd, Fagin, Date), as used by the stage 5 reference and review checklist en |
| dcterms:source | Shared-URI copy of data-modelling K-552 (Normalisation theory and relational design (Codd, Fagin, Date), as used by the stage 5 reference and review checklist) en |
| depends on knobit | Explains functional dependency |
| expected result | A candidate key is a minimal set of attributes that determines all others; a prime attribute belongs to a candidate key en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/05-logical/K-552 |
| rdfs:label | Explains candidate key and prime attribute en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| schema:isPartOf | Data quality management (DAMA-DMBOK2) |
| skos:definition | A candidate key is a minimal set of attributes that determines all others; a prime attribute belongs to a candidate key. en |
| skos:prefLabel | Explains candidate key and prime attribute en |
| target object | candidate key and prime attribute en |
Used by
| applies knowledge | Records the functional dependencies of an entity |
|---|---|
| applies knowledge | Recognises a uniqueness rule with no unique key behind it |
| depends on knobit | Explains second normal form |
| depends on knobit | Explains third normal form |
| depends on knobit | Explains domain-key normal form |
| depends on knobit | Explains lossless-join decomposition |
| depends on knobit | Explains natural keys, surrogate keys and key stability |
| depends on knobit | Explains identifying and non-identifying relationships |
| includes knobit | Derives a normalised logical data model and traces anomalies to their causes |
| includes knobit | Documents data rules in SBVR and resolves rule anomalies |
| includes knobit | Logical data model |
| includes knobit | Attribute and identifiers |
| includes knobit | Relational modelling scheme |
| requires knobit | Derive the logical data model |
| requires knobit | Document data rules in SBVR |