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  • 1

    Processing, Storing, and Organizing Data

    Free

    Start your journey into database design by learning about the two approaches to data processing, OLTP and OLAP. In this first chapter, you'll also get familiar with the different forms data can be stored in and learn the basics of data modeling.

  • 2

    Database Schemas and Normalization

    In this chapter, you will take your data modeling skills to the next level. You'll learn to implement star and snowflake schemas, recognize the importance of normalization and see how to normalize databases to different extents.

  • 3

    Database Views

    Get ready to work with views! In this chapter, you will learn how to create and query views. On top of that, you'll master more advanced capabilities to manage them and end by identifying the difference between materialized and non-materialized views.

  • 4

    Database Management

    This final chapter ends with some database management-related topics. You will learn how to grant database access based on user roles, how to partition tables into smaller pieces, what to keep in mind when integrating data, and which DBMS fits your business needs best.

Initializing

Exercise

Create a role

A database role is an entity that contains information that define the role's privileges and interact with the client authentication system. Roles allow you to give different people (and often groups of people) that interact with your data different levels of access.

Imagine you founded a startup. You are about to hire a group of data scientists. You also hired someone named Marta who needs to be able to login to your database. You're also about to hire a database administrator. In this exercise, you will create these roles.

Instructions 1/3

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  • 1

    Create a role called data_scientist.

  • 2

    Create a role called marta that has one attribute: the ability to login (LOGIN).

  • 3

    Create a role called admin with the ability to create databases (CREATEDB) and to create roles (CREATEROLE).