INTRODUCTION TO BASIC CONCEPTS OF D.B.M.S.
1.1} DATA è Data is the basic building blocks of every DBMS. Data is nothing but facts, figures, statistic, etc. Having NO particular meaning. DATA consist of two types. 1. Qualitative and 2. Quantitative. 1) Qualitative è It is descriptive information. For ex. “good morning”. 2) Quantitative è It again divided into two types. 2.1) Descript è It only takes integer value or whole no. For ex.1, 2, 3, 4, 5, 2.2) Continues è It only takes continue value. Floating point. ex.1.2, 2.3. 1.2} INFORMATION è Collection of related data items have NO meaning but if we process on that we will get meaningful information. For ex. 1 yogesh 2yr The above ex. Has NO meaning but if we organized them in proper manner. Then they represent meaningful information. For ex. Rno name class 1 yogesh 2yr Column/field/attribute/Domain. Rows/tup