DBMS

Classification of database management system is based on various parameters such as the kind of data model used to construct the DBMS, the number of users that will be using the database system, the way in which the database is distributed. In the section ahead, we will be discussing all the criteria on which the database system can be classified. Classification of Database … [Read more...] about Classification of Database Management System

Domain relational calculus (DRC) is a formal query language that is 'non-procedural' and 'declarative'. Being a form of relational calculus the domain relation calculus also specifies what information has to be retrieved, not how that information has to be retrieved.  Domain relational calculus is much similar to the tuple relational calculus the only difference is that the … [Read more...] about Domain Relational Calculus

Tuple relational calculus is a formal query language that we use to retrieve information from the relational database. It is a non-procedural query language, that only states what information has to be retrieved but, it does not state how the particular information has to be retrieved. We also refer to the tuple relational calculus as a declarative query language as it … [Read more...] about Tuple Relational Calculus

The database system environment is comprised of the components that are meant for defining and managing the data that we collect, store, manage and use in the database environment. In the section ahead, we will discuss all the components that constitute the database environment and along with this, we will also discuss the system utilities that are used to control and manage … [Read more...] about Database System Environment

Entity and attribute are the most common terms of DBMS. The fundamental difference between the entity and attribute is that an entity is an object that exists in a real-world and can be easily distinguished among all other objects of real-world whereas, the attributes define the characteristics or the properties of an entity on the basis of which it is easily distinguishable … [Read more...] about Difference Between Entity and Attribute in Database