SQL & Databases
How to optimally organize and query data – no matter how much.
Databases are the foundation of every modern application, and understanding them gives you a clear advantage. At DevCraft Academy, our focus is clearly on SQL databases – they're the industry standard and the backbone of almost all larger applications. While SQL plays the biggest role, we also give you an overview of NoSQL databases so you understand the differences and use cases. But don't worry: the focus is on SQL, because that's what you'll need most in your daily work.
Why you should master SQL in your sleep
SQL databases are everywhere – whether in web applications, enterprise software, or mobile apps. They provide the structure, stability, and performance that modern applications require. Those who master SQL can not only work efficiently with data but also specifically improve the performance and security of their applications. While NoSQL databases are used in special cases like big data and unstructured data, in practice, SQL-based systems like MySQL, PostgreSQL, or SQL Server are the clear leader.
What you'll learn with us
Our SQL units in the program are comprehensive and practical – we start with the fundamentals and move directly into advanced topics when needed. NoSQL is touched upon, but SQL databases are the focus because they're most frequently needed in real projects.
Our key topics at a glance:
Comparison of SQL and NoSQL
We give you an overview of the most important differences and use cases. While NoSQL is well-suited for unstructured data, we show you why SQL databases are the first choice in most projects.
Different Database Systems
PostgreSQL, MongoDB, Redis & Co – you'll learn which database systems exist and what matters when choosing a system. Our focus is clearly on SQL-based systems.
SQL Query Basics and CRUD Operations
SELECT, INSERT, UPDATE, DELETE – these operations are the foundation for everything you want to do with data. You'll learn how to create queries and manage data efficiently.
Relational Design and JOINS
Relational databases are characterized by their tables and relationships. You'll learn how to design tables, efficiently link them together, and write queries that combine data from multiple tables.
Indexes, Constraints, and Performance
Performance matters! You'll learn how to use indexes and constraints to keep your database performant and how to avoid common mistakes like N+1 queries.
ER Diagrams and SQL Schema
Good database structures make work easier. With ER diagrams and well-thought-out schema design, you create a stable foundation for your application.
Database Migrations and ORMs
Databases are constantly evolving. We show you how to safely perform migrations and work efficiently with ORMs in your backend.
Transactions and Concurrency
Data manipulations must be safe and consistent. You'll learn how to use transactions and handle concurrent access.
Database Security
Data security is essential. We show you how to properly manage access rights, prevent SQL injections, and secure your database.
Backups, Dump & Restore
You'll learn how to automate backups and ensure that you can quickly access your data in an emergency.
Why DevCraft Academy?
At DevCraft Academy, we place special emphasis on teaching you exactly what you need in practice. We offer you a tailored program that's oriented to your individual prior knowledge – whether you're just starting out or already want to master advanced topics like performance optimization and database security.
Our practical approach ensures that you don't just learn theory but also understand how to apply what you've learned in real projects. With our support, you'll be able to develop efficient, secure, and performant database solutions.