Databases Resources

Custom Error Handling Framework for an Enterprise Using MuleSoft

Learn how to make that Mule gallop like a horse by creating your own custom exception handling framework for your MuleSoft app.

December 22, 2017

by Rakesh Kumar Jha

· 12,547 Views · 4 Likes

Too Many PreparedStatement Placeholders in Oracle JDBC

In this post, we discuss a particular error related to JDBC making calls out to an Oracle database. Read on for the details.

December 22, 2017

by Dustin Marx

· 17,477 Views · 2 Likes

A Guide for Customer Retention Analysis With SQL

See how to make basic customer retention analysis, build customer retention over time, deal with new vs. existing customers retention curves, and calculate retention analysis in cohorts.

December 22, 2017

by Luba Belokon

· 27,204 Views · 4 Likes

The Evolution of EC2 Network Performance: m3, m4, and m5

So, are AWS EC2's fancy new m5 instances worth it? In a word: yes. See the performance impact and cost savings you can expect.

December 21, 2017

by Andreas Wittig

· 11,971 Views · 4 Likes

Data Visualizations With InfluxDB and Plotly.js

Walk through creating data visualizations with InfluxDB and plotly.js, a JavaScript graphing library built on top of d3.js and stack.gl.

December 20, 2017

by Margo Schaedel

· 13,870 Views · 3 Likes

Implicit vs. Explicit Cursor: Which Should You Use?

"Hmmm," you might be saying to yourself, "a conversation about SQL queries in a post on conditional logic? That's strange." Ah, but maybe not so strange.

December 20, 2017

by Steven Feuerstein

· 7,682 Views · 2 Likes

Elasticsearch for Dummies

Get to know the basics of Elasticsearch, its advantages, how to install it, and how to index documents using Elasticsearch.

December 20, 2017

by Alex Mailajalam

· 9,867 Views · 1 Like

Install oh-my-zsh on Windows

This tutorial is for Windows users who want to set up oh-my-zsh, an open source framework for managing your z shell, or ZSH, configuration.

December 20, 2017

by Michal Bocek

· 27,533 Views · 2 Likes

Row Level Security in Hibernate Using @Filter

Learn how to give certain people permission to view certain parts of your database, and thus increase your database's security.

December 20, 2017

by Ali Akbar Azizkhani

· 21,795 Views · 12 Likes

Highly Available Docker Registry on AWS With Nexus

Want a place to keep your Docker images that won't fail when the chips are down? See how you can create an HA repo on AWS using Nexus.

December 20, 2017

by Mohamed Labouardy

· 11,112 Views · 5 Likes

Making Graph Databases Fun Again With Java

Graph databases need to be made fun again! Not to worry — the open-source TinkerPop from Apache is here to do just that.

December 20, 2017

by Otavio Santana

CORE

· 21,980 Views · 12 Likes

Looking Inside Postgres at a GiST Index

What does the GiST API do? And what does it mean to extend Postgres’s indexing system, exactly? Read on to find out!

December 19, 2017

by Pat Shaughnessy

· 11,275 Views · 5 Likes

How to Pick Different CSV Files at JMeter Runtime

A CSV file is a file that enables users to represent data in a table format. Learn how to manipulate CSV files using the open source tool JMeter.

December 19, 2017

by Sebastian Lorenzo

· 16,387 Views · 2 Likes

Communicating Between Microservices

Inter-service communication is essential to consider when building microservices. Learn about the characteristics and benefits of different communication styles.

December 19, 2017

by Piotr Mińkowski

· 197,014 Views · 107 Likes

Data Modelling: Counter Table

Sometimes, you need to avoid failure scenarios where in-memory systems aren't suitable. In those cases, I recommend using an aggregate counter table.

December 19, 2017

by Jonathan Levin

· 9,636 Views · 2 Likes

Check out this great article on to learn how to create authentication and authorization protocols in your web application using ASP.NET.

December 19, 2017

by Kelvin Santos Amorim

· 43,920 Views · 4 Likes

EC2 Network Performance Demystified: m3 and m4

Choosing the right AWS EC2 instance for your network can be a challenge, so here are some benchmarks for m3 and m4 instances to help your decision making.

December 18, 2017

by Andreas Wittig

· 7,276 Views · 1 Like

SAML-Based SSO With Azure AD B2C as an IDP

While signing on might not be the most fun thing for users, for devs, it's a critical part of the process of application security.

December 18, 2017

by Shanky Munjal

· 16,172 Views · 3 Likes

Saving a Tree in Postgres Using LTREE

Trees are natural, haphazard, and branching; database tables are man-made rectangles full of numbers and text. How can you possibly save a beautiful tree structure into an boring DB table?

December 18, 2017

by Pat Shaughnessy

· 13,867 Views · 2 Likes

Manipulating Trees Using SQL and the Postgres LTREE Extension

Today, I'll show you how to delete, move, and copy branches from one place to another in your tree using @> in combination with other LTREE functions.

December 17, 2017

by Pat Shaughnessy

· 22,072 Views · 5 Likes

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