Query optimization
Write fast, efficient SQL queries. Understand execution plans, reduce query time, and handle large datasets confidently.
Indexing strategies
Master B-tree, hash, composite, and partial indexes. Know when to index, when not to, and how to measure the impact.
Stored procedures
Write reusable database logic using stored procedures, functions, and triggers across MySQL and PostgreSQL.
Database design
Design normalized, scalable database schemas for enterprise-grade applications using best practices and design patterns.
Transactions & ACID
Understand commit, rollback, isolation levels, and locking to build reliable, crash-safe database applications.
Replication & scaling
Set up master-replica replication, horizontal sharding, and connection pooling for high-availability enterprise systems.