CISC 332 Lecture Notes - Lecture 2: Query Language, Unstructured Data, Data Model
10 Feb 2018
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Data known facts that can be recorded and have implicit meaning. Database - collection of related facts o o o o. Structured data has set information, and relations o o. Ex: an excel sheet that you set up to represent your accounting. Data model set of constructs used to provide the meaning or interpretation of the data. Schema description of the application data specified with the data model. Database management system set of programs that enable user to define, construct and manipulate a db o. File processing o o o data definition is part of application programs programs and data are interdependent all access must be done via programs, not the query language. Self-describing when you set db up, you define this is my data, this is how i want it. Cisc 332 notes page 1 o o o o o o o o.
