DATABASE MANAGEMENT SYSTEM Lecture #4 Mrs.Vasanthi Muniasamy M.Sc., M.Phil Department Of Information Systems King Khalid University
BASIC CONCEPTS1. What is a database?A database is a collection of data which can be used:• alone, or• combined to other datato provide answers to the user’s question.
2. What is a Database Management System?A DBMS is a collection of programs which• provide management of databases• control access to data• contain a query language to retrieve information easily
3. Database DesignIt is important to design the database in such a way that:• A specific item can be reached easily•The database can respond to the user’s different questionseasily•The database occupies minimum storage space•The database contains no unnecessary data•Data can be added and updated easily without causingmistakes
GLOSSARY OF TERMSDatabase : Collection of TablesTable : Collection of RecordsRecord : Collection of FieldsFields : Collection of DataData : Piece of Information
PARTS OF A TABLE Fields Data Reg. No Name Address 111 Tony AbhaRecords 222 Rosy Khamis Reg. No Sex Course 111 Male IITRecords 222 Female MBA