Yes, you can use SQL databases in game development. However, the effectiveness depends on your specific needs.
SQL databases are relational databases designed to manage structured data across multiple tables. They're excellent for handling complex queries and maintaining data integrity. If your game involves a lot of data that has relationships (like MMORPGs with lots of players, items, quests, etc.), then an SQL database could be very beneficial.
For example, if you have a game with users who can own various items, you could structure it like this:
In this example, each player can own several items and each item can be owned by several players.
However, while SQL databases offer powerful querying capabilities, they might not be as fast or efficient for certain types of data retrieval when compared to NoSQL databases. For real-time or large-scale multiplayer games where speed is paramount, or when dealing with unstructured data, a NoSQL database might be a better fit. Ultimately, your choice of database should align with what you need for your particular game's requirements.