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Ranjit KarmakarshutterstockAnalyzing relational databases isn’t always easy. The SQL JOIN commands are an important tool for combining database tables, performing complex queries and efficiently evaluating linked data. In this tutorial, we introduce the different SQL JOIN commands and provide examples of…
ElnurshutterstockIn order to use SQL, you need to create a new database first. The command you use to do this is called SQL CREATE DATABASE. In this article, we explain more about the command, its limitations, as well as show you how to use it. This way, you can easily create your own databases…
REDPIXEL.PLshutterstockIf you have grouped entries in your table with GROUP BY, you can further filter them using the SQL HAVING condition. This dedicated guide explains how to use the condition, how to combine it with aggregate functions, and what the differences are between SQL HAVING and WHERE. You…
agsandrewShutterstockThere are often NULL values in a table. These appear when a field isn’t filled in. Although these NULL values aren’t problematic, they can clutter the overview. With the SQL COALESCE() function, you can instruct the system to skip these values and output the first value that…
To delete one or more entries from a table, it makes sense to use the SQL DELETE statement. This command allows you to remove individual, multiple, or all entries. In this article, we explain how to use SQL DELETE and what you should take into consideration when using it. We’ll…
Having your own The Front server gives you a number of practical advantages when designing your game. However, before you start with the configuration, you’ll need to create the right hosting environment. What requirements does the server application of the post-apocalyptic…
If you’ve set up a new database, you’ll need tables to store your data. You can easily create these using the SQL CREATE TABLE statement. In this article, we introduce you to the command and show you, through examples, which parameters to use when setting it up. You will also…
UndreyShutterstockIf you need to transfer data from one table to another, you can use the SQL INSERT INTO SELECT statement. We’ll guide you through how this command works, whether you’re copying an entire table or just specific columns. Additionally, we’ll provide practical examples to show how…
Elena KharichkinashutterstockIf you want to determine the number of rows in your table using a database query, SQL COUNT() is the most effective method. By incorporating a WHERE clause, the function enables you to refine your query even further, adding significant value. In this article, we explain SQL…
If you come across an empty expression in a table, you can replace it with an alternative value. In our article, we introduce you to the SQL IFNULL() function, specifically designed for this task. We explain the structure of the function in detail and provide practical examples…