SQL Theory

SQL : Basic Concepts of Query Processing
Are you wondering about SQL, Query, Database Query, or Query processing? Haven’t you heard about these SQL terms before? No problem! Let’s come over here

SQL : Query Optimizer in Structured Query Language
In this article, you will learn about the SQL Query Optimizer that will describe some of the most important key terms of SQL, such as

SQL: Converting SQL Queries into Relational Algebra
SQL Queries into Relational Algebra – Before moving ahead, let’s read Basic Concepts of SQL. Table of Contents Languages for describing queries on a relational

SQL: Cost Evaluation in Query Optimization
In this article, we will explore how cost evaluation plays an important role in SQL query optimization. We will also discuss some of the cost

SQL: Cost Based Query Optimization
This article is about SQL Cost Based Query Optimization that describes the factors at which query optimization chooses the best lowest cost plan to optimize

Introduction To Functional Dependency
Functional Dependency – Before moving ahead, let’s read Cost Based Query Optimization. This article is about Functional Dependency which describes what is Functional Dependency? And