Book Image

AWS Certified Developer - Associate Guide - Second Edition

By : Vipul Tankariya, Bhavin Parmar
5 (2)
Book Image

AWS Certified Developer - Associate Guide - Second Edition

5 (2)
By: Vipul Tankariya, Bhavin Parmar

Overview of this book

This book will focus on the revised version of AWS Certified Developer Associate exam. The 2019 version of this exam guide includes all the recent services and offerings from Amazon that benefits developers. AWS Certified Developer - Associate Guide starts with a quick introduction to AWS and the prerequisites to get you started. Then, this book will describe about getting familiar with Identity and Access Management (IAM) along with Virtual private cloud (VPC). Next, this book will teach you about microservices, serverless architecture, security best practices, advanced deployment methods and more. Going ahead we will take you through AWS DynamoDB A NoSQL Database Service, Amazon Simple Queue Service (SQS) and CloudFormation Overview. Lastly, this book will help understand Elastic Beanstalk and will also walk you through AWS lambda. At the end of this book, we will cover enough topics, tips and tricks along with mock tests for you to be able to pass the AWS Certified Developer - Associate exam and develop as well as manage your applications on the AWS platform.
Table of Contents (30 chapters)
Free Chapter
1
Overview of AWS Certified Developer - Associate Certification

Understanding RDBMSes

An RDBMS enables you to create databases that can store related data. A database is a collection of information that stores data in tables. A table is a collection of related data entries consisting of columns and rows.

An RDBMS enables you to create a link between these tables by establishing a relationship between them. This relational model helps in obtaining related information from multiple tables using SQL. You can see in the following diagram that there are three tables: Employee_Master, Department_Master, and Emp_Dept. All these tables are related with a key field that is called the primary key. In the following example, you can see how the Emp_Dept table, which provides department details for employees, is linked to the Employee_Master and Department_Master tables:

Relationship between tables in an RDBMS

In a nutshell, this is how an RDBMS stores...