Database Rankings, Analysis, and Book Giveaway (September 2021)

In September 2021, DB‑Engines released its ranking of 378 database management systems, highlighting that Oracle and MySQL remain the most popular worldwide while domestic databases such as DM, TiDB and others are gaining ground.

The report notes a growing diversity of time‑series databases, with InfluxDB leading the category and improving its score, and a strong presence of key‑value stores, where Redis tops the list and surpasses Elasticsearch and Db2.

ClickHouse is presented as a fast‑growing open‑source OLAP database, with several large Chinese tech companies (Toutiao, Tencent, Ctrip, Kuaishou) deploying massive clusters for real‑time analytics.

Alongside the technical analysis, the community announces a book‑giving activity sponsored by Huazhang Technology, offering participants a chance to win one of ten carefully selected database books, including “Database System Concepts”, “DBA Handbook”, “Database Internals”, “SQL Optimization”, “Redis Development and Operations”, “InfluxDB in Practice”, “ClickHouse Practical Guide”, “HBase Principles”, “PostgreSQL Mastery”, and “MySQL Insider”.

To enter, users must follow the AiKeSheng open‑source community public account, scan the QR code, and can increase their winning odds by inviting friends; winners have until three days after the automatic draw on 21 September 2021 16:00 to submit their contact details and chosen book.