SQL Server, Postgres, Oracle, Cassandra, Mongo, Yugabyte — replication, performance, and surviving 3am pages.
A DBA-friendly introduction to Oracle tablespaces, data files, autoextend, free space, temp usage, undo, and the SQL checks every Oracle admin should know.
A practical Oracle DBA guide to creating users, assigning roles, managing privileges, and avoiding over-permissioned accounts.
A practical starter guide to PostgreSQL performance: slow queries, indexes, vacuum, statistics, memory, connections, and wait symptoms.
A simple but detailed guide to PostgreSQL indexing for DBAs and developers, with practical examples and common mistakes.
A practical introduction to Cassandra architecture for DBAs: clusters, nodes, partition keys, replication factor, consistency levels, and operational tradeoffs.
Cassandra data modeling explained simply: why query-first design matters, how partition keys work, and why normalization habits can hurt performance.
A DBA-friendly introduction to MongoDB architecture, including documents, collections, replica sets, sharding, indexes, and operational checks.
A practical MongoDB indexing guide covering query patterns, compound indexes, covered queries, explain plans, and common performance traps.
A practical explanation of YugabyteDB architecture, distributed SQL, tablets, replication, nodes, and PostgreSQL-compatible access.
A practical guide for PostgreSQL DBAs learning YugabyteDB: SQL compatibility, distributed storage, replication, indexes, and operational differences.
A practical Oracle 26ai architecture guide for DBAs, covering the instance, database files, CDB/PDB model, SGA, PGA, background processes, listener, services, and SQL*Plus verification commands.
A simple but detailed DBA-friendly walkthrough of Oracle AI Database 26ai features, including AI Vector Search, JSON Relational Duality, SQL Firewall, SQL enhancements, and SQL*Plus changes.