Discovering Computers - Chapter 10: Database Management

Chapter 10 Database Management Chapter 10 Objectives Define the term, database Identify the qualities of valuable information Explain why data is important to an organization Discuss the terms character, field, record, and file Identify file maintenance techniques Differentiate between a file processing system approach and the database approach Discuss the functions common to most DBMSs Describe characteristics of relational,object-oriented, and multidimensional databases Explain how to interact with Web databases Discuss the responsibilities of database analysts and administrators Next Data and Information What is a database? Collection of data organized so you can access, retrieve, and use it Create database Database software allows you to Database software also called database management system (DBMS) Create forms and Add, change, and delete data Sort reports and retrieve data p. 514 Next Data and Information How are data and information related?  Data is raw facts Step 2. The  Information is data that is organized and meaningful  Computers process data into information computer extracts the member data from disk. receipt processing Step 1. The member data, including a photograph, is entered and stored on the hard disk. data stored on disk Step 3. The receipt is created and printed. p. 514 Fig. 10-1 Next Data and Information What is data integrity?  Degree to which data is Garbage in correct  Garbage in, garbage out (GIGO)—computer phrase that means you cannot create correct Garbage out information from incorrect data Data integrity is lost p. 516 Next ... - tailieumienphi.vn