Relational Database question (1 Paragraph each question)

timer Asked: Nov 10th, 2013

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"Relational Databases" Please respond to the following:

  • You will recall that a relational database is the primary method for organizing and maintaining data today in information systems. It organizes data in two-dimensional tables with rows and columns called “relations.” Each table contains data about an entity and its attributes. Each row represents a record, and each column represents an attribute or field. Each table also contains a key field to uniquely identify each record for retrieval or manipulation. Provide examples of five good key fields.

  • Designing a database requires both a logical design and a physical design. The logical design models the database from a business perspective. The organization's data model should reflect its key business processes and decision-making requirements. The process of creating small, stable, flexible, and adaptive data structures from complex groups of data when designing a relational database is termed “normalization.” A well-designed relational database will not have many-to-many relationships, and all attributes for a specific entity will only apply to that entity. Give an example of a many-to-many relationship and explain its unsuitability for a relational database.

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