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-written SELECT statements.
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