You check `EXPLAIN` during code review and find no slow queries, yet in production, hundreds of SQL statements are being executed. This is the N+1 problem. Even if your index design is correct, ...
A beginner-friendly tutorial on how to build hardcore blockchain infrastructure in Substrate, an open source framework. In this self-guided tutorial, you’ll build a gas-less, Bitcoin-like blockchain ...
Explain the difference between inner join, left join, and full join with SQL examples. How do I choose between Lazy and Eager fetching in JPA? Write a custom SQL query using @Query in Spring Data JPA ...
This project is a beginner-friendly, production-style Spring Boot REST API for task management. It is designed for a 1-day hands-on workshop where students learn: ...
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