Recognises a soft delete the constraints do not understand
https://knobit.org/id/knobit/K-625
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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 referential integrity and referential actions |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: `party.is_deleted`; the unique constraint on `registry_code` includes deleted rows, so the company cannot be registered again; payments keep pointing at a deleted party Acceptable: Uniqueness over active rows only (a filtered unique index where the dialect has one, otherwise a DQ rule); a rule on what may reference a deleted row; views that expose active rows; or deleted rows moved to a history table 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-625 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 04-physical, row 25; S&W 15.5; this skill (`conventions.soft_delete`) en |
| expected result | The keys and foreign keys unaware of the flag en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/06-physical/25 |
| rdfs:label | Recognises a soft delete the constraints do not understand en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| skos:altLabel | Soft delete the constraints do not understand (physical model) en |
| skos:definition | Rows marked deleted but still present, with keys and foreign keys unaware of the mark. The deleted row blocks a valid insert, or uniqueness is dropped and active duplicates load, and active rows reference deleted ones. en |
| skos:prefLabel | Recognises a soft delete the constraints do not understand en |
| target object | deleted flag ignored by keys en |
Used by
| includes knobit | Designs a physical data model for the target platform without introducing anomalies |
|---|---|
| requires knobit | Design the physical data model |