The Northwind PostgreSQL Sample Database Running on a Distributed SQL Database

The Northwind database is a sample database that was originally created by Microsoft and used as the basis for their tutorials in a variety of database products for decades. The Northwind database contains the sales data for a fictitious company called “Northwind Traders,” which imports and exports specialty foods from around the world. The Northwind database is an excellent tutorial schema for a small-business ERP, with customers, orders, inventory, purchasing, suppliers, shipping, employees, and single-entry accounting. The Northwind database has since been ported to a variety of non-Microsoft databases including PostgreSQL.

In this post, we are going to walk you through how to download and install the PostgreSQL-compatible version of Northwind on the YugaByte DB distributed SQL database.

Download and Install YugaByte DB

For complete instructions on how to get up and running on a variety of platforms including prerequisites, check out our Quickstart Guide. In the following section, we’ll cover the basic steps for getting up and running in just a few minutes with a local 3 node cluster on your Mac.

Download and Extract

$ wget https://downloads.yugabyte.com/yugabyte-1.3.0.0-darwin.tar.gz
$ tar xvfz yugabyte-1.3.0.0-darwin.tar.gz && cd yugabyte-1.3.0.0/

Note: The above instructions are for version 1.3.0. To find the latest version of YugaByte DB, visit the quickstart page.

Configure Loopback Addresses

Add a few loopback IP addresses for the various YugaByte DB nodes to use.

sudo ifconfig lo0 alias 127.0.0.2
sudo ifconfig lo0 alias 127.0.0.3
sudo ifconfig lo0 alias 127.0.0.4
sudo ifconfig lo0 alias 127.0.0.5
sudo ifconfig lo0 alias 127.0.0.6
sudo ifconfig lo0 alias 127.0.0.7

Create a 3 Node Cluster

With the command below, you’ll create a 3 node cluster with a replication factor of 3.

$ ./bin/yb-ctl --rf 3 create

Check the Status of the Cluster

Now let’s take a look at the status of the cluster and all the nodes that comprise it.
$ ./bin/yb-ctl status

As you can see from the output, we have three nodes running locally with a replication factor of 3. This means that every piece of data is being replicated on all three nodes.

Enter the YSQL shell

Next, run the ysqlsh command to enter the PostgreSQL shell.

$ ./bin/ysqlsh --echo-queries
ysqlsh (11.2)
Type "help" for help.
postgres=#

What’s YSQL? It’s YugaByte DB’s PostgreSQL-compatible, distributed SQL API.

We are now ready to build the Northwind database.

Download and Install the Northwind Sample Database

Download Northwind

You can download the Northwind database that is compatible with YugaByte DB from our GitHub repo. Here are the two files you’ll need:

• northwind_ddl.sql, which creates tables and other database objects
• northwind_data.sql, which loads the sample data into Northwind

Create the Northwind Database

CREATE DATABASE northwind;

Let’s confirm we have the Northwind database by listing out the databases on our cluster.

postgres=# \l

Switch to the Northwind database.

postgres=# \c northwind
You are now connected to database "northwind" as user "postgres".
northwind=#

Build the Northwind Tables and Objects

northwind=# \i /Users/yugabyte/northwind_ddl.sql

We can verify that all 14 of our tables have been created by executing:

northwind=# \d

Load Sample Data into Northwind

Next, let’s load our database with sample data.

northwind=# \i /Users/yugabyte/northwind_data.sql

Let’s do a simple SELECT to pull data from the customers table to verify we now have some data to play with.

northwind=# SELECT * FROM customers LIMIT 2;

Explore Northwind

The dataset consists of 14 tables, and the table relationships are showcased in the entity relationship diagram below:

The dataset contains the following:

• Suppliers: Suppliers and vendors of Northwind
• Customers: Customers who buy products from Northwind
• Employees: Employee details of Northwind traders
• Products: Product information
• Shippers: The details of the shippers who ship the products from the traders to the end-customers
• Orders and Order_Details: Sales Order transactions taking place between the customers and the company

That’s it! Using the command line or your favorite PostgreSQL development or administration tool, you are now ready to start exploring the Northwind database.