Introduction

	Introduction
	If you would like to learn how to retrieve information from a database, but don’t know what to begin with, then this book is intended for you. If you are familiar with SQL, or even are a database specialist, it still may be of interest for you to test your level of knowledge. The goal of this book is to let you learn SQL(Structured Query Language) is a database computer language designed for the retrieval and management of data in relational database management systems (RDBMS), database schema creation and modification, and database object access control management.SQL quickly. Here, «quickly» does not mean «superficially». On the contrary, while leaving aside many aspects of the language, the author tries to convey a thorough understanding of logical data structure, and consequently of constructing correct to give the idea of correct form of query taking into account structure. On top of that, we strongly believe, that reading of this book will contribute to understanding of the problems, which are outside the scope of this work. Content: (1.1) What is this textbook devoted to? (1.2) What do you need to work with the textbook? (1.3) How to use this textbook (1.4) Terminology used and implementation features (1.5) Acknowledgments sql database schema

SQL Problems and solutions