Recursive relationship type in dbms software

N-ary relationship types

recursive relationship type in dbms software

Recursion in a data model is an especially difficult topic. We say we have a recursive relationship if the same entity type appears more than once in a. Expand Information Systems, Databases, and Models Transformation Model · DBMS Model An entity can participate in a recursive relationship (also called fishhook) where the same entity is both the parent and the child. Second, the attribute “company-id” in the key, which identifies each instance of COMPANY, is not. The conceptual level describes the logical structure of an entire database, including . ER diagram notation for recursive relationship type, supervision.

recursive relationship type in dbms software

В некотором отдалении от него возникла фигура человека, приближавшегося медленно и неотвратимо. В руке его поблескивал пистолет.

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Беккер, отступая к стене, вновь обрел способность мыслить четко и ясно.