Databases

How to Deploy Elasticsearch on Kubernetes

September 8, 2021

The tutorial gives two examples for deploying Elasticsearch on seven dedicated pods. Learn how you can configure and create a custom Elasticsearch cluster on Kubernetes manually.

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What Is a Database?

September 2, 2021

This article defines the database and the various components that make up a storage system. Learn about the history of databases, the various types that exist and where the future development of databases is headed.

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How to Use MySQL String Functions

August 12, 2021

MySQL string functions allow you to manipulate character string data using the SELECT statement. Learn to use MySQL string functions with this comprehensive tutorial.

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How to Repair MySQL Database

August 5, 2021

A corrupt database can happen at any moment. Try some of these methods to repair your MySQL database quickly.

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How to Fix 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)'

August 3, 2021

MySQL is the most popular open-source relational database management system. This tutorial will help you identify and fix the cause of the 'can't connect to local MySQL server through socket' error.

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PostgreSQL Data Types

July 29, 2021

As a relational database management system, PostgreSQL offers a variety of data types for users to work with. This tutorial covers the different built-in data types available in PostgreSQL.

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Best Database Management Software - Top 25 Software

July 21, 2021

A DBMS facilitates data manipulation and provides an additional security layer for your database. This article lists the 25 best database management systems.

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RDD vs. DataFrame vs. Dataset


Spark contains three major data structures and APIs for working with big data: RDDs, DataFrames and Datasets. Learn about the difference between them as well as when it's best to apply each.

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How to Create a Spark DataFrame


Spark DataFrames are an essential part of working with data in Spark. Learn how to create DataFrames from scratch in this easy to follow tutorial.

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How to Install SQL Server on MacOS

July 13, 2021

Microsoft's SQL Server 2019 supports Windows 10, Linux, macOS, and Docker as install options. This tutorial takes you through the process of installing SQL Server on macOS as a Docker deployment.

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