Complete Notes on RDBMS

Relational Calculus is a Non-procedural Query Language which uses mathematical predicate calculus instead of algebra. Relational calculus doesn’t work on mathematics fundamentals such as algebra, differential, integration, etc. That’s why it is also known as predicate calculus. There is two type of relational calculus: Tuple relational calculus Domain relational calculus Relational calculus is a theoretical … Read more

Relational Algebra is a Procedural Query Language which contains a set of operations that take one or two relations as input and produce a new relationship. Relational algebra is the basic set of operations for the relational model. The decisive point of relational algebra is that it is similar to the algebra which operates on … Read more

The DML Compiler translates DML statements in a query language that the query evaluation engine can understand. DML Compiler is required because the DML is the family of syntax element which is very similar to the other programming language which requires compilation. So, it is essential to compile the code in the language which query … Read more

DData Manipulation Language (DML) is a language that enables the user to access or manipulate data as organized by the appropriate data model. For example- SELECT, UPDATE, INSERT, DELETE. There is two type of DML: Procedural DML or Low level DML: It requires a user to specify what data are needed and how to get … Read more

Data Definition Language (DDL) is a standard for commands which defines the different structures in a database. Most commonly DDL statements are CREATE, ALTER, and DROP. These commands are used for updating data into the database. DDL, or Data Definition Language, is a set of commands used to define and manage the structure of a … Read more