MySQL to DynamoDB: Build a Streaming Data Pipeline on AWS Using Kafka

This is the second part of the blog series which provides a step-by-step walkthrough of data pipelines with Kafka and Kafka Connect. I will be using AWS for demonstration purposes, but the concepts apply to any equivalent options (eg running these locally in Docker). This part will show Change Data Capture in action that lets … Read more

Understand the MySQL Index Optimization Artifact | by Dwen | Jun, 2022

MySQL index optimization tutorial Photo by Dose Media on Unsplash With the increasing number of users and data volume, the slow query is an unavoidable problem. In general, if a slow query occurs, it means that the interface responds slowly, the interface times out, and other problems. If it is a high concurrency scenario, the … Read more

Major PostgreSQL Features You Should Know About

If you are already familiar with other SQL databases but new to PostgreSQL, then this article is perfect for you. It will help you understand the nuances and get started with PostgreSQL. Note: Most comparisons in this article are targeted towards MySQL since it is the closest open source database that PostgreSQL can be compared … Read more

JavaFX program with MySQL isn’t working because “this.Music” is null

Need help! I don’t quite understand what’s wrong with my code – can someone point it out to me, please? I am working on JavaFX, creating a program with two windows. In the second window, there is a table with columns. I created my database in MySQL, added some data to it, and it works … Read more

mysqli – Mysql not receiving new values ​​from PHP code

I have created a test app on 000ebhost using PHP and HTML, while testing on localhost with XAMPP it was working, but when trying on the web host it is not creating new values ​​any more… Here’s the page: <?php include ‘connection.php’; $get_products = “SELECT * FROM tb_products “; $query_products = mysqli_query($conx, $get_products); ?> <!doctype … Read more

mysql – Can not install mysql2-0.3.16 on Mac M1

Trying to launch my work project, but when I do bundle I get this error Fetching mysql2 0.3.16 Installing mysql2 0.3.16 with native extensions Gem::Ext::BuildError: ERROR: Failed to build gem native extension. current directory: /Users/alexandra_shimanovich/.bundle/ruby/2.5.0/gems/mysql2-0.3.16/ext/mysql2 /Users/alexandra_shimanovich/.rbenv/versions/2.5.5/bin/ruby -I /Users/alexandra_shimanovich/.rbenv/versions/2.5.5/lib/ruby/site_ruby/2.5.0 -r ./siteconf20220608-34831-zm49z7.rb extconf.rb –with-mysql-lib=/opt/homebrew/opt/mysql/lib –with-mysql-dir=/opt/homebrew/opt/mysql –with-mysql-config=/opt/homebrew/opt/mysql/bin/mysql_config –with-mysql-include=/opt/homebrew/opt/mysql/include –with-ldflags=-L/opt/homebrew/opt/openssl@3/lib –with-cppflags=-I/opt/homebrew/opt/openssl@3/include checking for ruby/thread.h… yes checking for rb_thread_call_without_gvl() in … Read more

sql – Nan values ​​in csv covert to null values ​​in MySQL

Hi I am currently converting a table with some NULL values ​​from MS SQL database to csv which means all these NULL values ​​will become NaN. Then I plan to convert the csv to MySQL database, however, they give me an error saying unknown column ‘nan’ in field list. Does anyone know how to solve … Read more