Book Image

Snowflake Cookbook

By : Hamid Mahmood Qureshi, Hammad Sharif
5 (1)
Book Image

Snowflake Cookbook

5 (1)
By: Hamid Mahmood Qureshi, Hammad Sharif

Overview of this book

Snowflake is a unique cloud-based data warehousing platform built from scratch to perform data management on the cloud. This book introduces you to Snowflake's unique architecture, which places it at the forefront of cloud data warehouses. You'll explore the compute model available with Snowflake, and find out how Snowflake allows extensive scaling through the virtual warehouses. You will then learn how to configure a virtual warehouse for optimizing cost and performance. Moving on, you'll get to grips with the data ecosystem and discover how Snowflake integrates with other technologies for staging and loading data. As you progress through the chapters, you will leverage Snowflake's capabilities to process a series of SQL statements using tasks to build data pipelines and find out how you can create modern data solutions and pipelines designed to provide high performance and scalability. You will also get to grips with creating role hierarchies, adding custom roles, and setting default roles for users before covering advanced topics such as data sharing, cloning, and performance optimization. By the end of this Snowflake book, you will be well-versed in Snowflake's architecture for building modern analytical solutions and understand best practices for solving commonly faced problems using practical recipes.
Table of Contents (12 chapters)

Identifying dropped databases, tables, and other objects and restoring them using Time Travel

Time Travel can be used to recover tables, schemas, and even complete databases. In this recipe, we are given a scenario where a database and other objects have been deleted. We will identify what has been deleted and recover them back to the previous state.

Getting ready

You will need to be connected to your Snowflake instance via the web UI or the SnowSQL client to execute this recipe.

How to do it…

We will first create a database, then two schemas in that database, and some tables within those schemas. We will then gradually delete the tables, schemas, and eventually the complete database. Then we will try to recover them through the Time Travel feature:

  1. We will start by creating a new database, followed by the creation of a schema. To do so, run the following SQL:
    CREATE DATABASE C8_R3;
    CREATE SCHEMA SCHEMA1;
  2. Next, we will create a test table called CUSTOMER...