Recognises a collation changing what a key means
https://knobit.org/id/knobit/K-819
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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 collation and case or accent sensitivity |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: SQL Server with the usual case-insensitive database collation: `uk_dim_party_reference` treats `ee-00412` and `EE-00412` as one party, and a migration from a case-sensitive source merges two customers into one with no error Acceptable: Identifiers normalised on load (IBAN upper-cased, spaces removed) so the key does not depend on collation, and the collation named in `physical_options` for the engines that accept it — making the key's meaning a decision in the model rather than a server setting 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-819 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 05-ddl, row 19; UTS #10; ISO 9075 en |
| expected result | The collation and the case or accent sensitivity the key needs en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/08-ddl/19 |
| rdfs:label | Recognises a collation changing what a key means en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| skos:altLabel | Collation that changes what a key means (generated DDL) en |
| skos:definition | The case and accent sensitivity of the columns in a key, which on most engines comes from a server or database default nobody chose here. Case-insensitive makes an IBAN and its lower-case form one key; case- and accent-sensitive makes `Mägi` and `Magi` two parties. Either can be right; an unexamined default cannot. en |
| skos:prefLabel | Recognises a collation changing what a key means en |
| target object | key column collation en |
Used by
| includes knobit | Generates DDL per target dialect and reviews it against model, engine, data and deployment |
|---|---|
| requires knobit | Generate and review DDL |