Protecting and controlling access to your data against unauthorized person(s) is crucial in any organization. Unauthorized entry or modification of your data can lead to severe and sometimes irreversible damage. Just like we mentioned at the beginning of this series, MySQL Replication is a process where data from one MySQL database known as the source … Read more
Tables in a MySQL database are commonly related to one another, often in multiple ways, and it is only by linking the tables together that you can derive meaningful information from the data. To connect these tables together, you can use the JOIN clause, which you include in your SELECT, DELETE, or UPDATE statements. The … Read more
MySQL provides a set of constraints that you can include in your table definitions to help ensure the integrity of the data. The constraints let you better control the types of data that can be added to the database. For example, you can use constraints to set a column’s uniqueness or nullability, specify a default … Read more
If you’ve been using MySQL for a while and want to learn how to orchestrate MySQL containers, you’ve come to the right place. And while using Docker on its own to manage a single MySQL instance or multiple instances has certain drawbacks, such as lacking the ability to orchestrate multiple instances, scale, and provide services … Read more
MySQL Group replication is a remarkable feature introduced in MySQL 5.7 as a plugin. This technology allows you to create a reliable group of database servers. One of the most important features of MySQL’s group replication is that it allows these servers to store redundant data. This allows the database state to be replicated across … Read more
Welcome back to another replication series! As a quick reminder, we explored various methods of using MySQL’s replication capabilities in our previous discussions. Initially, we employed the traditional binary-log-based replication approach to set up our replication servers. This involved tracking the binary log file and its positions to facilitate replication. In this article, we will … Read more
In the previous article in this series, I introduced you to the MySQL LOAD DATA statement, which lets you retrieve data from a plain text file and insert it into a table. In this article, I cover the SELECT…INTO OUTFILE statement, a type of SELECT statement that includes the INTO OUTFILE clause. The clause lets … Read more
In the previous parts of these MySQL optimization series, we’ve told you how queries work on a high level, then dived deeper into the power of SELECT and INSERT statements. In this blog, I will cover some of the ways to optimize modifying your data too. UPDATE Queries – the Basics As the name of … Read more
Welcome back to the world of MySQL Replication! If you’ve been following this series, thank you for your support! And if you’re new here, welcome! Before we dive in, I suggest checking out the first part of the series to get up to speed. In this article, I’ll be delving into multi-source replication and explaining … Read more
MySQL transactions provide an effective method for executing multiple statements as a single unit, making it possible to safely modify data, while preventing concurrent users from updating the same data or overwriting changed data. If any statements within a transaction fail or do not achieve their desired results, the changes can be rolled back and … Read more
Welcome back to the MySQL optimization series! In case you haven’t been following this series, in the past couple of articles we have discussed the basics of query optimization, and told you how to optimize SELECT queries for performance as well. In this blog, we’re further learning ways to optimize INSERT operations and look at … Read more
Database and development teams often load data from plain text files into their MySQL databases. The files might be used to add lookup data, support test and development environments, populate new MySQL instances, load data from regular feeds, or in other ways support their operations. To help with the import process, MySQL provides the LOAD … Read more
In the first part of this series, we spoke about MySQL Replication, the different types, replication formats, benefits, and downsides, as well as a brief introduction to the requirements needed for setting up MySQL Replication. To ensure we stay on track with our intended topic, it’s important to have certain prerequisites in place before we … Read more
In the previous article in this series, I introduced you to how to access MySQL data from within a Python script. The article described how to use the MySQL Connector to establish a connection with a database and then retrieve data through that connection. In this article, I continue the discussion by demonstrating how to … Read more
MySQL Replication is a process where data from one MySQL database known as the source (formerly called “master”) is copied over to one or more other databases called replicas (formerly called “slaves”). Think of this like having a backup buddy that is always in sync and up to date, giving you peace of mind. It’s … Read more
Applications of all types commonly access MySQL to retrieve, add, update, or delete data. The applications might be written in Python, Java, C#, or another programming language. Most languages support multiple methods for working with a MySQL database and manipulating its data. The approach you take when accessing MySQL will depend on the programming language … Read more
Optimizing read operations is one of the most prominent problems concerning any database administrator. No matter what kind of database management system is in use – MySQL, its flavors like Percona Server or MariaDB, MongoDB, TimescaleDB, SQL Server, or others, read queries are a concern. The primary read query example is SELECT queries, but a lot of this pertains to UPDATE and DELETE as well since they too have to fetch rows to be operated on.… Read more
As with many relational database management systems, MySQL provides a variety of methods for combining data in a data manipulation language (DML) statement. You can join multiple tables in a single query or add subqueries that pull data in from other tables. You can also access views and temporary tables from within a statement, often … Read more
A subquery is a type of query that is embedded—or nested—into a data manipulation language (DML) statement. The data returned by the subquery is passed into the DML statement and incorporated into its overall logic. The subquery itself is typically a SELECT statement, although you can also use a TABLE statement or VALUES statement. Even so, the SELECT statement continues to be the most common choice for subqueries, and that’s the one I focus on in this article.… Read more
In the last few articles in this series, you learned about three important data manipulation language (DML) statements: SELECT, INSERT, and UPDATE. The statements make it possible to retrieve, add, and modify data in a MySQL database. Another DML statement that is just as important is DELETE, which lets you remove one or more rows from a table, including temporary tables. In this article, I focus exclusively on the DELETE statement to help round out our discussion on the core DML statements in MySQL. Overall, the DELETE statement is fairly basic, but one that’s no less necessary to have in your arsenal of DML tools.
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