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Relational model

PT 2520 Unit 1

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PT 2520 Unit 1 Homework Clarence Gross 12/22/12 At its simplest, a database can be seen as a collection of related data. True A delimited file is a file where the length of the file is limited. False A delimited file is one in which the data is separated by a character such as a comma. True All fixed length files are of the same length. True In relational database, logic design is kept separate from physical design. True A hierarchical database is designed with a tree-like structure that resembles a file system. True Codd defined the core principles of a relational database in 1970 True Data redundancy improves the integrity of a database. False In a diagram, crows feet notation conveys more information about the relationships. True
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