IndexDatabase Management System and File SystemDBMS File SystemCharacteristics of Database ApproachData Model of DBMS ArchitectureThe Role of Data ModelsThree PerspectivesA data model instance can be of three types according to ANSI in 1975:Instances and schemasThe DBMSA database is an organized collection of data. A relational database is a collection of schemas, tables, queries, reports, views, and other elements. A database management system (DBMS) is a computer software application that interacts with end users, other applications, and the database itself to acquire and analyze data. A generic DBMS allows the definition, creation, querying, updating and administration of databases. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get Original Essay Database Management System vs File System DBMS File System Big no. of files used. Less no. of files used. Better security, username and password Does not provide security. The redundancy problem is solved since the data is independent. Data redundancy is a loss of integrity problem. Accessing data takes a long time. It takes less time. Extensive permanent planning. Little preliminary planning. Characteristics of the Database Approach Representing Aspects of the Real-World Application A database represents the characteristics of the real-world application. According to this, the change in the real world will be reflected in the database. Information Management An information is very useful for any work we do so that the database takes care of its information. Managing information through the database makes us deliberate users of data. Easy operational implementation makes it powerful All operations like insert, delete, update, search etc. used in the database are performed simply and flexibly. A user with some knowledge can perform these operations easily, which makes it powerful. Self-descriptive nature A database must be able to self-describe, narrate and describe itself, and contain a description of the entire database. Logical relationship between records and data helps the user to access various records based on the logical conditions through a single query from the database. DBMS Architecture Data Model A data model is an abstract model that organizes data elements and standardizes how they relate to each other and to the properties of real-world entities. The term data model is used in two distinct but closely related senses. Sometimes it refers to an abstract formalization of the objects and relationships present in a particular application domain. A data model explicitly determines the structure of the data. Data models are specified in data modeling notation, which often has a graphical form. A data model can sometimes be called a data structure, especially in the context of programming languages. Data models are often complemented by function models, especially in the context of business models. The role of data models The main purpose of data models is to support the development of information systems by providing the definition and format of data. According to West and Fowler (1999) "if this is done consistently across systems, data compatibility can be achieved. If the same data structures are used to store and access data, different applications can share data. Keep in mind : This is just a sample. Get a custom paper now from our expert writers Get a custom essay Three Perspectives An instance of data model can be of three types according to ANSI in 1975: Data Model..