Understanding Correlated Subqueries in PostgreSQL (with Practical Examples)
Correlation (aka correlated subquery) means: a subquery that references columns from the outer query, so it must be re-evaluated for each outer row...
Spring Assert utility explained
The org.springframework.util.Assert class in Spring is a small but powerful utility used to validate method arguments and state at runtime. It helps you fail fast by throwing an IllegalArgumentException (or IllegalStateException) when a condition is not met 🚨
Weighted routing in Spring Cloud Gateway
Weighted routing in Spring Cloud Gateway is built-in via the Weight Route Predicate. You define multiple routes in the same group, each with a different weight, and Gateway will distribute matching requests proportionally (per group).