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Database Management System (DBMS) an Introduction

Database Management System (DBMS) an Introduction. Intro to DBMS. Objectives. Understand why databases are important to modern organizations Understand how databases work Understand how organizations can maximize their strategic potential with databases. Intro to DBMS.

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Database Management System (DBMS) an Introduction

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  1. Database Management System (DBMS) an Introduction Powered by DeSiaMore

  2. Intro to DBMS Objectives • Understand why databases are important to modern organizations • Understand how databases work • Understand how organizations can maximize their strategic potential with databases Powered by DeSiaMore

  3. Intro to DBMS • Data is a vital part of any organization. It needs to be stored, organized, managed, accessed, protected and manipulated. • Operational • Use databases to: • Create a book • Track book sales • Set salaries and wages • Pay employees Powered by DeSiaMore

  4. Intro to DBMS Purpose of DBMS • The purpose of a database is to keep track of things • Unlike a list or spreadsheet, a database may store information that is more complicated than a simple list Powered by DeSiaMore

  5. Intro to DBMS Database Management for Strategic Advantage • The Database Approach: Foundational Concepts • DBMS – Database Management Systems • Use a DBMS software to create, store, organize, and retrieve data from a single database or several databases • Example: Microsoft Access Powered by DeSiaMore

  6. Intro to DBMS Database Management for Strategic Advantage • Advantages of the Database Approach • Program-data independence • Minimal data redundancy • Improved data consistency • Improved data sharing • Increased productivity of application development • Enforcement of standards • Improved data quality • Improved data accessibility • Reduced program maintenance Powered by DeSiaMore

  7. Intro to DBMS Database Management for Strategic Advantage • Effective Management of Databases • The database administrator (DBA) : • Works with programmers and analysts to design and implement the database • Works with users and managers to establish database policies • Implements security features and establishes database permissions Powered by DeSiaMore

  8. Intro to DBMS Database Systems • The four components of a database system are: • Users • Database Application • Database Management System (DBMS) • Database Powered by DeSiaMore

  9. Intro to DBMS Database Systems Powered by DeSiaMore

  10. Intro to DBMS Database Systems - Users • A user of a database system will • Use a database application to track things • Use forms to enter, read, delete and query data • Produce reports Powered by DeSiaMore

  11. Intro to DBMS Database Systems – Database Application • A set of one or more computer programs that serves as an intermediary between the users and the DBMS • Application program that read or modify database data by sending SQL statements to DBMS. • Application program to present data to users in the format of forms and reports. Powered by DeSiaMore

  12. Intro to DBMS Database Systems – Database Application : Functions • Create and process forms • Process user queries • Create and process reports • Execute application logic • Control database applications Powered by DeSiaMore

  13. Intro to DBMS Database Systems – DBMS • A computer program used to create, process and administer the database • DBMS receives request encoded in SQL and translates these requests into actions on the database • DBMS is a large, complicated program that is licensed software. Almost majority of the companies never write their own DBMS program. Powered by DeSiaMore

  14. Intro to DBMS Database Systems – Database • The database is a collection of related tables and other structures. • A database is a self-describing collection of related records Powered by DeSiaMore

  15. Intro to DBMS Functions of DBMS • Create databases • Create tables • Create supporting structures • Read database data • Modify database data (insert, update, delete) • Maintain database structures • Enforce rules • Control concurrency • Provide security • Perform backup and recovery Powered by DeSiaMore

  16. Intro to DBMS Organizational DBMS Powered by DeSiaMore

  17. Intro to DBMS Organizational DBMS • Organizational database systems typically: • Support several users simultaneously • Include more than one application • Involve multiple computers • Are complex in design • Have many tables • Have many databases Powered by DeSiaMore

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