Common Components Of Digital Database Management Applications

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A DBMS can also provide many perspectives of a single database schema. A perspective characterizes what information the client sees and how that client sees the information. The DBMS gives a level of reflection between the reasonable diagram which characterizes the legitimate structure of the database and the physical construction that portrays the records, files and other physical instruments utilized by the database. At the point when a DBMS is utilized, frameworks can be adjusted all the more effectively when business prerequisites changes. New classifications of information can be added to the database without aggravating the current framework and applications can be protected from how data is organized and put away. Obviously, a…show more content…
It is used to access or manipulate records or rows within a relational database. Primary key is the field containing a unique label identifying a record or row in a table. Each table has a least one primary key. Keys should be meaningful to the data being stored. Examples: employee ID number, Social Security number Queries: Queries are the searches initiated by users to retrieve information from the database. It consists of sets of variables or keywords formatted in a query language. - SQL is one of the query language. (Parrish, 1997) Example of SQL query: SELECT title FROM songs, artists, WHERE songs.artists=groups.ID AND groups. Name= ‘Madonna’ Database models: Database models represents the way data is stored and determines how data is retrieved and manipulated. There are four main database models. They are: Flat, Relational, Hierarchical and Network. (Johnson., 1997) (Nicolai, Database Security and Review, 2016) Object Oriented Databases: Object-oriented database management systems allows storing and retrieving objects and complex data types such as CAD files, Artificial intelligence objects, XML-compatible objects, General multimedia (audio and video). Originally, we’re not widely adopted to object oriented databases when released in 1985. But, used in specialized areas today. Database type is determined by data that will be housed in it. (Kim, 1990) There are
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