Recognises a hierarchy encoded redundantly
https://knobit.org/id/knobit/K-608
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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 |
| applies knowledge | Explains derived data and point-in-time snapshots |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: `branch.path = '/1/4/17/'` with no foreign key on the parts; moving branch 4 under another region rewrites every row below it, and a mistyped path loads Acceptable: `parent_branch_id` with a foreign key as the system of record; a path, nested set or closure table only as a derived structure with `derivation` and a DQ rule. A closure table has foreign keys on both columns 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-608 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 04-physical, row 8; Karwin, Naive Trees; S&W 12.6; Codd 1971 en |
| expected result | The encoding and what keeps it consistent en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/06-physical/08 |
| rdfs:label | Recognises a hierarchy encoded redundantly en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| skos:altLabel | Hierarchy encoded redundantly (physical model) en |
| skos:definition | A recursive relationship stored as a path string or nested-set numbers. The structure is held many times over, moving one node rewrites all its descendants, and no foreign key checks the encoding. A specific form of row 3. en |
| skos:prefLabel | Recognises a hierarchy encoded redundantly en |
| target object | path string or nested-set encoding en |
Used by
| includes knobit | Designs a physical data model for the target platform without introducing anomalies |
|---|---|
| requires knobit | Design the physical data model |