Relational Database (33)

• MariaDB Galera Cluster | Galera Cluster | MariaDB Documentation (mariadb.com) reference
  synchronous multi-master replication for MariaDB: implementation, config and production operation
  Database Administration High Availability #
• How To Install LAMP Stack (Apache, MySQL, PHP) on Ubuntu (digitalocean.com) tutorial
  Installing Apache, MySQL and PHP on Ubuntu as a working LAMP stack
  Ubuntu Web Server #
• How To Install PostgreSQL on Ubuntu (digitalocean.com) tutorial
  Installing PostgreSQL on Ubuntu and creating roles and databases
  Database Administration Ubuntu #
• PostgreSQL: Documentation (postgresql.org) reference
  version-indexed PostgreSQL manuals, current and unsupported releases, browsable or PDF
  Database Administration SQL #
• GitHub - mysql/mysql-server: MySQL Server, the world's most popular open source database, and MySQL Cluster, a real-time, open source transactional database. (GitHub) repo
  Oracle's MySQL server and NDB Cluster sources, GPLv2 community edition
  Database Administration SQL #
• MariaDB Foundation - MariaDB.org (MariaDB.org) organisation
  MariaDB Foundation news on server internals: pluggable aggregates, JSON_TABLE, sponsorship; MariaDB is GPLv2
  Nonprofit SQL #
• SQLite Home Page (sqlite.org) tool
  Self-contained C library SQL engine with no server process, public-domain source
  SQL #
• Firebird: The true open source database for Windows, Linux, Mac OS X and more (Home) tool
  InterBase-lineage SQL engine for Linux, Windows and macOS; open source, commercial support ecosystem
  Database Administration SQL #
• MySQL Software (Percona) tool
  Percona's MySQL stack: drop-in server, XtraDB Cluster, XtraBackup, operator; no licensing fees
  Backup Database Administration High Availability #
• MonetDB (MonetDB) tool
  column-store SQL engine for analytics and hybrid HTAP, full ACID, window functions, UDF hooks; open source
  Analytical Database SQL #
• Apache Derby (db.apache.org) tool
  embedded Java relational database with JDBC drivers, ~3.5 MB footprint; retired read-only since Oct 2025
  Database Administration SQL #
• H2 Database Engine (redirect) (h2database.com) tool
  Embedded Java SQL engine, open source, runs in-process or as a standalone server
  SQL #
• CUBRID | Enterprise Open Source DBMS (cubrid.org) tool
  OLTP-tuned open source DBMS with heartbeat-based HA failover, broker middleware and GUI admin
  Database Administration High Availability #
• SQL Server Downloads | Microsoft (microsoft.com) tool
  installer downloads per SQL Server edition; Express and Developer free, trials for the rest
  Database Administration Free Tier #
• What is SQL Server on Linux? - SQL Server (learn.microsoft.com) reference
  running Microsoft's proprietary engine on RHEL, Ubuntu, SLES, in containers or WSL2
  Database Administration SQL #
• Oracle AI Database Free | Oracle (oracle.com) tool
  no-cost Oracle 26ai edition capped at 2 CPUs, 2 GB RAM and 12 GB data; formerly Express Edition
  Database Administration Free Tier #
• Db2 | IBM (ibm.com) tool
  IBM enterprise database for mixed transactional and analytic workloads; free Community Edition
  Commercial Support Free Tier #
• CockroachDB Docs - CockroachDB (CockroachDB) reference
  distributed SQL built to survive region failures; docs plus free Cockroach University, core source-available
  Distributed SQL SQL #
• YB Documentation (YugabyteDB Docs) reference
  Distributed PostgreSQL-compatible SQL: geo-distribution, sharding, Kubernetes deploys, Apache-2.0
  Distributed SQL High Availability #
• TiDB Self-Managed (docs.pingcap.com) reference
  MySQL-compatible HTAP cluster: TiUP and Kubernetes deployment, TiFlash, migration, tuning; Apache-2.0
  Analytical Database Distributed SQL #
• Vitess (vitess.io) tool
  Sharding, connection pooling and automatic failover layer fronting MySQL; live resharding
  Distributed SQL High Availability #
• Citus Data | Distributed Postgres. At any scale. (Citus Data) tool
  Postgres extension adding row- and schema-based sharding for scale-out; open source, free to self-manage
  Distributed SQL SQL #
• Tiger Data Documentation (Tiger Data Docs) reference
  TimescaleDB, the PostgreSQL time-series extension: hypertables, continuous aggregates, self-run or cloud
  SQL Time Series Database #
• pgAdmin - PostgreSQL Tools (pgadmin.org) tool
  PostgreSQL object browser and query tool with graphical EXPLAIN; desktop or web, open source
  Database Administration Web Application #
• DBeaver Community | Free Open-Source Database Management Tool (dbeaver.io) tool
  cross-engine desktop SQL client; Community Edition no-cost under Apache-2.0, paid PRO alongside
  Database Administration SQL #
• phpMyAdmin (phpMyAdmin) tool
  web front end for MySQL/MariaDB: tables, users, privileges, SQL, import/export, 97 languages
  Database Administration Web Application #
• PgBouncer - lightweight connection pooler for PostgreSQL (pgbouncer.org) tool
  PostgreSQL connection pooler; release notes cover CVE-2025-12819 auth-time SQL injection via search_path
  Database Administration Vulnerability #
• Patroni: A Template for PostgreSQL HA with ZooKeeper, etcd or Consul — Patroni 4.1.5 documentation (patroni.readthedocs.io) reference
  PostgreSQL automatic failover and leader election via etcd, ZooKeeper or Consul, open source
  Database Administration High Availability #
• SQL Indexing and Tuning e-Book for developers: Use The Index, Luke covers Oracle, MySQL, PostgreSQL, SQL Server, ... (use-the-index-luke.com) tutorial
  vendor-agnostic SQL indexing and query tuning; free web edition of SQL Performance Explained
  Performance Analysis SQL #
• Part I. Tutorial (PostgreSQL Documentation) tutorial
  Introductory walkthrough of relational concepts and SQL against PostgreSQL, official Part I
  SQL #
• SQLite In 5 Minutes Or Less (sqlite.org) tutorial
  first steps with the sqlite3 command-line shell and the TCL binding; prebuilt binaries or build yourself
  Command Line SQL #
• Modern SQL: A lot has changed since SQL-92 (modern-sql.com) reference
  what the SQL standard added after SQL-92 -- CTEs, arrays, temporal -- with per-engine support tables
  SQL #
• PowerDNS Authoritative Nameserver - PowerDNS Authoritative Server documentation (doc.powerdns.com) reference
  authoritative nameserver serving zones from MySQL/PostgreSQL, BIND files or JSON APIs via backends
  DNS #