Logical constraint lost on the way down (physical model)
https://knobit.org/id/knobit/K-614
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| Context functions | Result evaluation |
|---|---|
| Knobit creation methods | AI generated, human edited |
| Knobit types | Skill |
| LCG purposes | Assessing the learner's knowledge or skill state |
| LCG purposes | Selecting an assessment task or learning activity |
| action verb | Recognises en |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: `BR-007: each account has exactly one IBAN`, `enforcement: constraint`, but `account.account_identifier` is nullable and not unique Acceptable: `NOT NULL` and a unique constraint, each citing `BR-007`; a rule no constraint can enforce changed to `enforcement: dq-check` with a DQ rule (`ANO-010`, `ANO-012`, `ANO-007`, `DQR-007`, `PHY-009`) en |
| assessment method | skill-tests task: Loan application physical model on Snowflake (physical design anomaly skills) en |
| conforms to profile | https://oppekava.edu.ee/a/Knobitite_kirjeldamise_ja_seostamise_reeglid#LCG-KNOBIT-0.1 |
| dcterms:identifier | K-614 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 04-physical, row 14; Fagin 1981; E&N 6.2; S&W 14.5; this skill en |
| expected result | A finding that names the defective physical model element and the defect en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/06-physical/14 |
| rdfs:label | Logical constraint lost on the way down (physical model) en |
| schema:creativeWorkStatus | superseded |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| schema:supersededBy | Recognises a constraint claimed by a rule and missing from the schema |
| skos:definition | A data rule with `enforcement: constraint`, or a logical `required`, key or value set, that no physical object enforces: a required attribute on a nullable column, a unique rule with no unique constraint, a value set with no foreign key or CHECK. Each one is a way in for invalid rows. en |
| skos:prefLabel | Logical constraint lost on the way down (physical model) en |
| target object | physical model en |