DBMS CONCEPTS 1. Database A database is a logically coherent collection of data with some inherent meaning‚ representing some aspect of real world and which is designed‚ built and populated with data for a specific purpose 2. DBMS It is a collection of programs that enables user to create and maintain a database. In other words it is general-purpose software that provides the users with the processes of defining‚ constructing and manipulating the database for various applications. 3. Database
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Data Bases Data base approach focuses on data integration and data sharing‚ views data as an organizational resource Data Base Management System (DBMS) refers to programs that control the data and interfaces between the data and application programs The data based‚ DBMS‚ and the application programs together are termed as data base system Data base administrator is the person responsible for the data base. Data base systems separate logical and physical views of data‚ referred to
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Database Management System (DBMS): It is a collection of interrelated data and set of programs to access the data. It contains information about a particular enterprise and also provides an environment that is both convenient and efficient to use. Database Applications: Banking: all transactions Airlines: reservations‚ schedules Universities: registration‚ grades Sales: customers‚ products‚ purchases Manufacturing: production‚ inventory‚ orders‚ supply chain Human resources: employee
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A database management system (DBMS) is a collection of programs that manages the database structure and controls access to the data stored in the database. In a sense‚ a database resembles a very well-organized electronic filing cabinet in which powerful software‚ known as a database management system‚ helps manage the cabinet’s contents. Advantages of the DBMS: The DBMS serves as the intermediary between the user and the database. The database structure itself is stored as a collection of files
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ACKNOWLEDGEMENT First of all I would like to thank a lot to my teacher who is an excellent lecturer. Under his guidance‚ I learnt a lot about DBMS concepts. And as a result‚ I become able to complete this assignment with confidence. I am also very thankful to God‚ my husband‚ my brother and also some of my classmates who helped me a lot in completing my assignment. (1) HOLDER HolderID Name Telephone DateOfBirth OrgName AgentID(F.K) ER- DIAGRAM :- AGENT AgentID Name Street
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After all business requirements have been gathered for a proposed network‚ they must be modeled. Models are created to visually represent the proposed network so that business requirements can easily be associated with network objects to ensure that all requirements have been completely and accurately gathered. Basically data modeling can fall into two types of categories: Physical modeling and Logical modeling. Logical modeling deals with gathering business requirements and converting those
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AC14/AT11 Database Management Systems TYPICAL QUESTIONS & ANSWERS PART -I OBJECTIVE TYPE QUESTIONS Each Question carries 2 marks. Choosethe correct or the best alternative in the following: Q.1 Which of the following relational algebra operations do not require the participating tables to be union-compatible? (A) Union (B) Intersection (C) Difference (D) Join Ans: (D) Q.2 Which of the following is not a property of transactions? (A) Atomicity (B) Concurrency (C) Isolation
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Database Management System Introduction A database management system is a computer based system to manage a database‚ or a collection databases or files. The essential word here is manage management implies the controlled use of a resource‚ that is controlling its quality coordinating shared use‚ of a resource‚ that is‚ controlling its quality‚ coordinating shared use and controlling access to authorized users. A DBMS has many uses: - it enables users to access and manipulate the database
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CMP 206: Principles of Database Management System Description UNIT1: Introduction: Data base system concepts and architecture‚ Data models schema and instances‚ Data independence and data base language and interface‚ Data definition languages‚ DML. Overall data base structure. Various Data models: Hierarchical‚ Network‚ ER and their comparisons UNIT2: Relational Database Language and interfaces: Relational data model concepts‚ integrity constraints ‚Keys domain constraints‚
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CIS515 – CLASS #1 NOTES 1. Database – is a collection of related files (Tables) 2. File (Table) – is a collection of records (Rows) 3. Record (Rows) – is a collection of fields (Columns) 4. Field (Columns) – is a collection of characters (Bytes) 5. Character (Bytes) – is a collection of 8 bits 6. Bits – the smallest representation of data‚ it is either 1 (on voltage) or 0 (off voltage) Database File Table Record Rows Field Columns Character Bytes Bits
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