Database Insights

Comprehensive PostgreSQL guide covering MVCC, extensions, partitioning, logical replication, and performance tuning. Learn why PostgreSQL powers modern applications.

Everything you need to know about MySQL: storage engines, replication topologies, performance tuning, and cloud deployment. From basics to advanced optimization.

Navigate the open source database landscape. Compare MySQL, PostgreSQL, MongoDB, Redis, and Cassandra with detailed feature analysis and selection criteria.

Use PostgreSQL range types (daterange, tstzrange) and exclusion constraints to prevent overlapping bookings and schedules. Includes room booking, multirange types, and GiST index examples.

Master PostgreSQL window functions: ROW_NUMBER, RANK, SUM OVER, LAG/LEAD, moving averages, and frame clauses. Real SQL examples for analytics and reporting queries.

Understand the differences between OLAP and OLTP systems — query patterns, storage engines, and when to use a hybrid approach

Use dbt to build modular SQL transformations — models, tests, documentation, and CI/CD for your data warehouse

Query remote PostgreSQL and MySQL databases from PostgreSQL with Foreign Data Wrappers. Covers postgres_fdw setup, IMPORT FOREIGN SCHEMA, and EXPLAIN pushdown verification.

Use MySQL 8.0 generated columns to index computed values, JSON paths, and date parts. Covers virtual vs stored tradeoffs and functional index patterns.

Use PostgreSQL CTEs and recursive queries for category trees, graph traversal, and complex aggregations. Covers MATERIALIZED vs NOT MATERIALIZED and cycle prevention.

Master MySQL 8.0 window functions for analytical queries. Covers ROW_NUMBER, RANK, LAG/LEAD for period comparison, running totals with SUM OVER, and NTILE quartiles.

PostgreSQL RLS enforces tenant isolation at the database level, bypassing application filtering bugs entirely. Learn to implement RLS policies, index for performance, and test policies before production.