GorodenkoffshutterstockA PHP script offers a simple and effective way to take information submitted through a website’s HTML form and store it in a MySQL or MariaDB database. This tutorial walks you through the basics of adding form data to your database, including how to create a straightforward PHP…
Connect worldshutterstockMicrosoft SQL Server is one of the leading database technologies, giving businesses the tools they need for effective data management and analysis. It is used in both business applications and real-time analytics, making it a reliable and powerful solution. In this guide, we…
IONOSby GeminiIt seems like almost every day a new software vulnerability is uncovered or an existing one is patched. One attack method that has long exploited such weaknesses is the SQL injection. But what exactly are these malicious database exploits, how do they work, and—most…
sakkmesterkeShutterstockWhen working with complex datasets, it’s important to be able to perform efficient, precise searches. One tool that can help with that is the logical operator OR. SQL’s OR returns records that meet at least one of two conditions. In this tutorial, we explain everything you need…
Paolo SchorlishutterstockWhether you need to calculate total costs, sales, order quantity or any other value, SQL SUM can do a large part of that mathematical work for you! As an aggregate function that adds up all the values in a column, it is an indispensable tool in SQL. In this tutorial, we show you…
BEST-BACKGROUNDSShutterstockDuplicate rows and values in the results of a query can reduce the quality of your data analyses. You can use SQL SELECT DISTINCT to get clean, precise results. This SQL clause removes duplicate rows and includes only unique values in your results. We explain everything you need…
G-Stock StudioShutterstockWhen querying large data sets, it helps to be able to sort your results. Luckily SQL ORDER BY does just that. It enables you to sort results in ascending or descending order based on one or more columns of your choosing. In this article, we explain how SQL ORDER BY works and…
Elena KharichkinaShutterstockYou want to search your database for information that doesn’t fulfill certain criteria? Then the SQL `NOT` is just what you need. This logical operator facilitates the precise filtering of search results by excluding results that don’t fulfill a condition. In this tutorial we…
Elena KharichkinaShutterstockYou likely have several queries and procedures that you frequently use when working with your database. Rather than writing those blocks of code out from scratch every time, you can use SQL stored procedures to save and retrieve them. We tell you everything you need to know about…
Wright StudioshutterstockThere are numerous approaches to storing large volumes of data and retrieving data from these volumes. However, no database technology is as widespread and established as SQL, the standard language for relational databases. We explain what SQL is and the features of the language.…