Top SQL Expert Reveals BEST Query Techniques

SQL SELECT optimization that saves 40,000X resources 🚀 Stop using SELECT * in your queries. Here's why: I ran an EXPLAIN PLAN on a SELECT * query pulling 1M rows. Result? 60 MILLION bytes transferred. Then I optimized it: ✅ Replaced * with specific columns ✅ Added WHERE clause filtering ✅ Result: 1,512 bytes That's a 99.99% reduction in query performance overhead. SQL query optimization isn't optional. Every SELECT statement you write impacts: → Database performance → Memory consumption → CPU usage → Network bandwidth → Cloud costs Your CTEs, JOINs, and subqueries all depend on well-w…