What is Database? A database is a collection of data with defined structure and purpose. Data can easily be accessed, managed, and updated. Data can be in any number of formats electronic, printed, graphic, audio, statistical, combinations Difference between Data and Information? Data are physical data such as numbers, text, images, and videos. Data is a representation of information. Information is knowledge that is derived from study, experience, or instruction. Information is any kind of knowledge that is exchangeable amongst people, about things, facts, concepts, etc., in some context. Information is interpreted data

Components A database consists of one or more tables. Each table has its own unique name and consists of columns and rows. Example: Spreadsheets (Microsoft Excel) –data in tabular form If you’re familiar with spreadsheets like Microsoft Excel, you’re probably already familiar with storing data in tabular form. PID SSN FNAME LNAME DOB AGE CITY 1111 123-00-1000 John Smith 1/1/1990 21 Fairfax 1112 234-00-1001 Lisa Baker 3/15/1980 31 1113 456-00-1003 Edward Cook 12/12/1977 32 Vienna 1114 789-00-1004 Tove Nilsen 7/8/2000 11

What is DBMS? A DBMS is a software package with computer programs that control the creation, maintenance, and the use of a database. Examples: Oracle, Microsoft SQL Server, IBM DB2, Informix Microsoft Access, Microsoft FoxPro, MySQL, Borland dBase Technically speaking, it is a software system that uses a standard method of cataloging, retrieving, and running queries on data. You might find a DBMS at school’s library or at a site on the internet. VA uses Vista as its electronic medical record system. Mumps is its DBMS. It is hierarchical database

What is Database System? The DBMS software together with the data itself.

A Database System Environment