BU486 Lecture Notes - Lecture 7: Financial Statement, Semantic Data Model, Unique Key
Document Summary
Chapter 4 relational databases: using a file-oriented approach to data and information, data is maintained in, a centralized database, many separate files. B) an insert anomaly: a memory anomaly, a delete anomaly, the potential inconsistency that could occur when there are multiple occurrences of a specific data item in a database is called the, update anomaly, inconsistency anomaly. The entities described by the second table are: marmosets, registration numbers, parental relationships, names, dana halsey is chair of the purebred marmoset society, which maintains a database of registered purebred marmosets and their breeding history. The entities described by the first table are: marmosets, registration numbers, parental relationships, names, dana halsey is chair of the purebred marmoset society, which maintains a database of registered purebred marmosets and their breeding history. One table will store the name, birthdate, and other characteristics of all of the marmosets that have been registered. Each marmoset is uniquely identified by a registration number.
