Learn SQL Once, Use It for 30 Years
12 hours ago
- #SQL
- #Databases
- #Programming
- SQL's syntax and mental model have remained consistent for over three decades, enabling queries from 1995 to run on modern database systems like PostgreSQL 18 in 2026 without changes.
- Unlike JavaScript and its frameworks, which frequently undergo disruptive changes and require rewrites, SQL's stability is rooted in relational algebra—a mathematical foundation that doesn't have release cycles.
- Learning SQL thoroughly, including joins, subqueries, window functions, and query plans, is a highly valuable investment for developers, as it remains applicable across jobs and technology stacks for decades.
- SQL's backward compatibility has drawbacks, such as NULL's three-valued logic issues, repetitive GROUP BY column lists, vendor-specific date handling, and dialect variations, but these trade-offs ensure long-term stability.
- SQL rewards long-term knowledge retention over trend-chasing, making it unique among programming languages for its durability and consistent utility in software development.