Database Transactions and Locking in MySQL: Avoiding Race Conditions
A practical guide to transactions, SELECT FOR UPDATE and optimistic locking for data that must stay correct under concurrency.
Zero-Downtime Database Migrations for Laravel Applications
How to change a production schema without locking tables or breaking the currently deployed code, using an expand-and-contract approach.
MySQL Indexes Explained: How to Read EXPLAIN and Fix Slow Queries
A slow query is usually a missing or mismatched index. Learn to read MySQL 8's EXPLAIN output, order composite index columns correctly and verify the fix.
SQL Window Functions in MySQL 8: Running Totals, Rankings and Top-N per Group
Stop exporting to spreadsheets. MySQL 8 window functions handle running totals, rankings and month-over-month growth in one readable query.