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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In the previous two articles in this series, you learned about SELECT and INSERT, two important data manipulation language (DML) statements in MySQL. In this article, I focus on the UPDATE statement, another valuable DML statement in MySQL.… Read more
mysqldump is one of the most popular database backup tools in the MySQL world. The tool is prevalent partly because it’s very basic and quite powerful – mysqldump database backup tool is command line-based, very simple and very straightforward to use. As far as MySQL or its flavors (MariaDB and Percona Server) are concerned, this … Read more
In the previous article in this series, I introduced you to the SELECT statement, one of several SQL statements that fall into the category of data manipulation language (DML), a subset of statements used to query and modify data. Another DML statement is the INSERT statement, which lets you add data to MySQL tables, both … Read more
There’s more to security in MySQL than user account privileges. In this article, Lukas Vileikis explains the other components of MySQL security.… Read more
There are several tools available to keep a MySQL database secure. In this article Lukas Vileikis discuses access control and user privileges.… Read more
Stored functions in MySQL return a scalar value and can be used in a SQL statement. In this article, Robert Sheldon explains how to create and use a MySQL stored function.… Read more
MySQL stored procedures are objects containing one or more SQL statements for reuse. They often contain business logic. Robert Sheldon demonstrates how to create and call stored procedures.… Read more
After getting a new database in place, the next step is to create tables. In this article, Robert Sheldon walks you through creating tables with SQL Workbench and with scripts.… Read more
The first step when getting started with MySQL is to get it installed and running. In this article, Robert Sheldon explains how to install it on Windows and create the first database and table.… Read more
Tapping the power of serverless computing via Lambda functions and cloud-native technologies allows us to extend the native capabilities that exist in open-source databases. David Yahalom demonstrates how to create a queue using Lambda that can be used to add queuing capabilities to MySQL.… Read more
SQL-based distributed Cloud Relational databases aren't new, but Amazon's Aurora offers an alternative to SQL Azure, and, being MySQL-compatible, provides the obvious route to the cloud for hosted LAMP web applications. Is this of interest to the rest of us? Rob Sheldon investigates.… Read more
MySQL Data Compare can both compare the data in MYSQL databases and also synchronise them. It is handy for a number of tasks for which MySQL has no built-in tools. Although it is intuitive to use and has online help, there has never been a manual; until now! … Read more
