Category Archives: Uncategorized

Relational to JSON with PL/SQL

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In the last post in this series, I demonstrated how powerful functions added to the SQL engine in Oracle Database 12.2 allow you to generate JSON with ease. But what if you were doing something sufficiently complex that it required the procedural capabilities that PL/SQL provides? Well, you’re covered there too! In this post, I’ll show you how new JSON based object types can be used to get the job done.
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Relational to JSON with SQL

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Oracle started adding JSON support to Oracle Database with version 12.1.0.2. The earliest support was targeted at storing, indexing, and querying JSON data. Version 12.2 rounded out that support by adding features for generating, exploring, and processing JSON data. See the JSON Developer’s Guide for a comprehensive overview of what’s now available. In this post, I’ll leverage the new SQL operators for JSON generation to convert the relational data to meet the goal.
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Creating a REST API: Database Basics

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With the web server in place, it’s time to look into some database basics. As mentioned in the parent post, this series will use the Oracle Database driver/API for Node.js (node-oracledb) to interact with the database. In this post, you’ll create a module that’s responsible for starting up and shutting down a database connection pool. You’ll also add a function that simplifies executing simple statements by getting and releasing connections from the pool automatically.
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Creating a REST API: Web Server Basics

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The web server is one of the most important components of a REST API. In this post, you will start your REST API project by creating some initial directories and files. Then you’ll create a web server module and wire things up so that the web server starts up and shuts down correctly. Finally, you will add some basic logging capabilities to the web server.
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Creating a REST API with Node.js and Oracle Database

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Node.js and REST APIs go hand in hand. In fact, Ryan Dahl (the creator of Node.js) once described the focus of Node.js as “doing networking correctly”. But where should you start when building a REST API with Node.js? What components should be used and how should things be organized? These are difficult questions to answer – especially when you’re new to the Node.js ecosystem.
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Connecting a Node.js App in ACCS to Exadata Express

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Two of my favorite Oracle Cloud services are the Exadata Express Cloud Service (Exadata Express) and the Application Container Cloud Service (ACCS). Exadata Express is a fully managed Oracle Database service at an entry-level price point for small to medium sized data and ACCS is an easy way to deploy apps in Docker containers. In this post, I’ll demonstrate how to connect these two services at the most basic level.
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How to get, use, and close a DB connection using async functions

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So far in this async series, we’ve covered Node.js style callbacks, the Async module, and promises. In this final part of the series, we’ll learn about async functions (a.k.a. async/await). To me, async functions are the most exciting thing to happen to JavaScript since Ajax. Finally, we can read JavaScript code in a synchronous manner while it executes asynchronously as it always has.
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