Once data is inserted into a table, data typically needs to be maintained as time goes on. To make changes to an existing row or a number of rows, in a table, the UPDATE statement is used. This article shows how to use the UPDATE statement to modify data within a SQL Server table. Syntax … 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
Before data can be read from of a SQL Server database table, the table needs to contain rows of data. One of the most typical ways to get data into a table is to use the INSERT statement. One row or multiple rows can be inserted with a single execution of an INSERT statement. You … Read more
In order to test graph structures, I needed a large set of random data. In some ways, this data will resemble the IMDB database I will include later in this chapter, but to make it one, controllable in size and two, random, I created this random dataset. I loaded a set of values for an … 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
During Build 2022, Microsoft announced a new feature, Datamarts for Power BI. MVP Dennes Torres explains this new feature and provides and example. … Read more
PostgreSQL database performance is critical for application performance. EzzEddin Abdullah shows how to get information about a query’s performance from the execution plan.… Read more
The VALUES clause makes inserting literal values into a table simple and easy. In this article, Joe Celko explains how to use the VALUES clause.… 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
The SSRS database contains a wealth of undocumented information that can help administrators. In this article, Edward Pollack explains how to get to the data and ways to use it.… 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
The Oracle optimizer often changes the query to get better performance. In this article, Jonathan Lewis explains two more optimizations involving subqueries.… Read more
