We are familiar with the ER model, which is an example of an object based logical model. There are other data models one of those is Record based logical model. Record based model consists of three types. The three types of record based models are : Hierarchial model Network model Relational model In a Hierarchical [...]
Continue reading → Attributes An Attribute is a property of a given entity. For example, ROLL NO is a property of an entity STUDENT. An attribute instance is particular property of an individual entity instance.For example, Peter is the instance of STUDENT entity and the roll number 101 is the instance of attribute ROLL NO and also the [...]
Continue reading → We would have hear about the database management system(DBMS) and relational database management system (RDBMS).The recent release of IBM is the Informix and this technology is considered to be the part of Relational Database Management System.Informix was first developed and released in the year 2001 and widely accepted by the IT development during the year [...]
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