Recognises a check weaker than its rule

Mida see tähendab

A check that lets through rows the rule forbids: one direction of a two-way rule, presence where the rule says exactly one, a range with an open end the rule closes, a value set wider than the rule's.

Kuidas seda hinnatakse

Flags the deficient case and passes the acceptable one. Deficient: Rule: each account has exactly one IBAN and no IBAN is shared. Check: `account_identifier IS NOT NULL` only. Duplicates pass Acceptable: Two checks: completeness on `account_identifier`, and uniqueness over it. Or the rule split into two at stage 3, each with its check

Tugineb

Explains relationship cardinality and optionalityK-567 · Teadmine
Explains traceability from data rule to checkK-752 · Teadmine

Vajalik

Puudub