Recognises a default inventing a business fact
https://knobit.org/id/knobit/K-820
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| Context functions | Result evaluation |
|---|---|
| Knobit creation methods | AI generated, AI edited |
| 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 null semantics and three-valued logic |
| applies knowledge | Explains the source-to-target mapping contract |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: MP-008 `interest_rate` default 0 Acceptable: Reject and raise en |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: `settled_amount DECIMAL(14,2) DEFAULT 0`: unsettled payments arrive as zero, the settlement total reconciles to the cent, and the missing settlements are invisible in exactly the figure someone reports Acceptable: `settled_amount` nullable with no default and a completeness DQ rule over the payments that should have settled. Defaults only on `created_at`/`updated_at` and on identity columns — and note the generator rejects a column that declares both `identity: true` and a `default` en |
| assessment method | Review of the stage 2 eval project (reffa/skills, data-integration/evals) en |
| assessment method | skill-tests task: Generated DDL review, Postgres and Snowflake (DDL review skills) en |
| conforms to profile | https://oppekava.edu.ee/a/Knobitite_kirjeldamise_ja_seostamise_reeglid#LCG-KNOBIT-0.1 |
| dcterms:identifier | K-820 |
| dcterms:identifier | N-208 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 02-source-to-target-mapping, row 8 (DMBOK) en |
| dcterms:source | Review checklist 05-ddl, row 20; ISO 9075; Kimball 2013 en |
| depends on knobit | Recognises a sentinel value standing in for null |
| expected result | The default and the null or rule replacing it en |
| expected result | The default removed and the owner asked en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/08-ddl/20 |
| rdfs:label | Recognises a default inventing a business fact en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data integration and interoperability (DAMA-DMBOK2) |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| skos:altLabel | Default that invents a business fact (generated DDL) en |
| skos:altLabel | Default that invents a fact en |
| skos:definition | A `DEFAULT` on a business column rather than a technical one. `CURRENT_DATE` on a value date fabricates a date when the feed omits one; `0` on an amount turns "unknown" into "zero", and the zero then sums into a total that reconciles; `'OPN'` on a status decides a business state on the loader's behalf. en |
| skos:definition | A missing value replaced by a business value. en |
| skos:prefLabel | Recognises a default inventing a business fact en |
| target object | DEFAULT on a business column en |
| target object | missing value replaced by a business value en |
Used by
| includes knobit | Generates DDL per target dialect and reviews it against model, engine, data and deployment |
|---|---|
| includes knobit | Maps sources to targets without losing value, and reconciles on value |
| requires knobit | Generate and review DDL |
| requires knobit | Map sources to targets |