Delve into building a GraphQL endpoint with Deno, compare technologies, configure queries, and integrate PostgresSQL and MongoDB databases to create a secure, high-performing application.

deno.tar.gz

Deno version

Deno run

deno_run_application

deno_run_db

deno_run_application_server_ts_file

docker-deno

Deno is a modern and secure runtime for JavaScript. It was created by the same team that created Node.js. Deno offers better performance, security, and simplicity than any other JavaScript runtime.

In this course, you will start by understanding the different technologies used in Deno, such as Typescript. You will compare these technologies with JavaScript and GraphQL as well as learn their terminologies. Then, you will create your own endpoint with Deno and configure queries and mutations in it. Next, you will explore two different databases with Deno: first, you’ll learn how to set up an SQL database using PostgresSQL and then how to configure a NoSQL database using MongoDB to store documents and collections of on-demand data. Finally, you’ll put everything together to have a fully functioning GraphQL endpoint made with Deno and backed by PostgreSQL and MongoDB. 

After this course, you’ll be able to create a Deno application and a GraphQL endpoint while having a database of your choice to store data.

Building a GraphQL Endpoint with Deno

What are the pros of using a Postgres database?

What are the pros of using a Postgres database?

`client.runQuery("select id, firstname, lastname from users;");`

`client.queryArray("select id, firstname, lastname from users;");`

`client.execute("select id, firstname, lastname from users;");`

How do we run a query if we use Deno and the Postgres driver, assuming we already defined the client?

How do we run a query if we use Deno and the Postgres driver, assuming we already defined the client?

How do we close the database connection if we use Deno and the Postgres driver, assuming we already defined the client?

How do we close the database connection if we use Deno and the Postgres driver, assuming we already defined the client?

Which SQL statement is used to insert new data into a database?

Which SQL statement is used to insert new data into a database?

(True or False.) We can delete data from a database using the PostgreSQL library for Deno.

(True or False.) We can delete data from a database using the PostgreSQL library for Deno.

Quiz yourself on the use of Postgres with Deno.

Introduction to Deno, TypeScript, and GraphQL

Creating a Basic GraphQL Endpoint

Databases and Deno

SQL: Postgres and Deno

NoSQL: Mongo and Deno

Wrapping Up

Appendix

Quiz: Postgres and Deno