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Overview/Description
A database is used by organizations to store their data, and allow their employees to access, update, and manage it. Organizations use a Database Management System, also known as a DBMS to control, store, organization and retrieve that data for the users through end-user applications. There are multiple types of database, such as flat-file, network, and hierarchical. The most widely used database is the relational database, which is based on a mathematical theory. A relational database stores data in relations, which are tables, that store data in rows or tuples and...
Overview/Description
Database design is an important process for creating databases. In an organization, the process sets the foundation for good database implementation and ensures that everything required for the business is provided. It also ensures that the database will perform as expected for the users. This course discusses what database modeling is and how it is used to aid database design. This course also describes the four steps in the database design life cycle, which are: requirements gathering and analysis, conceptual database design, logical database design, and physical...
Overview/Description
Database Management Systems, DBMSs, are used to control, maintain, and use a relational database where the data is stored. A relational database consists of the data records, files, and database objects. An important part of each organization is allowing users to gain access to the data for them to view and manipulated if required. In order for users to do this query languages are used which enable users to write queries and send them to the database to retrieve the appropriate data and return it to them. Queries can also be written to manipulate the data by updating,...
Overview/Description
When designing a database â after the requirements are gathered from the organization and the conceptual ERD has been approved â the logical design, and then the physical design can be completed. The logical design consists of taking the conceptual diagram and converting it to represent the logical implementation of the database; this includes identifying the entities, attributes, and the relationships that will exist. This also includes normalizing the database to remove redundant information. After the logical database design, the physical database needs to be...
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