Recognises a derived or copied column without a check
https://knobit.org/id/knobit/Q-304
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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: `account.holder_name` copied from `party.name` with `derivation: "copied by ETL"`; the ETL step is disabled in a refactor and nobody notices for a year Acceptable: `DQ-021`, `dimension: consistency`, `scope: set`, comparing `account.holder_name` with `party.name` through `holder_party_id`, `backs: [PE-057]` (`DQR-019`) en |
| assessment method | skill-tests task: Loan application data quality rules on Snowflake (DQ rule anomaly skills) en |
| conforms to profile | https://oppekava.edu.ee/a/Knobitite_kirjeldamise_ja_seostamise_reeglid#LCG-KNOBIT-0.1 |
| dcterms:identifier | Q-304 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 03-dq-rules (data-quality), row 4; Kimball & Caserta 2004; this skill (06-physical.md); formerly data-modelling K-704 en |
| depends on knobit | Recognises an unmanaged duplicate column |
| depends on knobit | Recognises a stored derived or summary value |
| expected result | The column and its recomputation check en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/07-dq-rules/04 |
| rdfs:label | Recognises a derived or copied column without a check en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data quality management (DAMA-DMBOK2) |
| skos:altLabel | Derived or copied column nobody watches (data quality rule) en |
| skos:definition | A column carrying `derivation` — a stored total, a copied name, a path string — with no check comparing it with a fresh computation. The update anomaly was accepted on purpose; the check is what makes it safe. A snapshot meant to keep the value as it was is not a copy and needs no check: say so in the `derivation`. en |
| skos:prefLabel | Recognises a derived or copied column without a check en |
| target object | column carrying a derivation en |
Used by
| includes knobit | Derives data quality rules from the data rules and the physical model |
|---|---|
| includes knobit | Develop and deploy data quality operations: manage data quality rules |
| requires knobit | Derive data quality rules |