What’s Driving the 2021 DB-Engines Rankings? A Deep Dive into Top 20 Databases
The November 2021 DB-Engines popularity ranking, based on October data, reveals shifts among the top 20 databases, highlights score drops for MySQL, SQL Server and MongoDB, growth for PostgreSQL and MongoDB, and explains the five metrics used to calculate these rankings.
DB-Engines has released its November 2021 popularity ranking, which reflects overall data changes from October.
The top‑20 databases this month remain the same as the previous month. The top ten are Oracle, MySQL, Microsoft SQL Server, PostgreSQL, MongoDB, Redis, IBM Db2, Elasticsearch, SQLite, and Cassandra. Notably, MySQL, SQL Server and MongoDB saw significant score declines of 8.25, 16.32 and 6.21 points respectively.
The three giants—Oracle, MySQL and Microsoft SQL Server—continue a downward trend compared with the same period last year.
In contrast, PostgreSQL and MongoDB posted clear score gains, making them the most improved databases in the ranking aside from Snowflake.
DB-Engines has introduced a “Sponsored post” icon to indicate databases that have paid for promotional articles, such as PostgreSQL’s “The Inexorable Rise of PostgreSQL”.
Ranking trends for the top ten databases:
Below are the top‑10 rankings for each database category.
Relational databases (top 10):
Key‑Value databases (top 10):
Document databases (top 10):
Time‑Series databases (top 10):
Graph databases (top 10):
The DB-Engines ranking is updated monthly and is based on five indicators:
Keyword search volume on Google and Bing.
Search volume on Google Trends.
Job search volume on Indeed.
Number of LinkedIn profiles mentioning the keyword.
Number of related questions and followers on Stack Overflow.
This analysis aims to provide database professionals with a reference for technology direction; the rankings do not reflect technical superiority or market share, and choosing a database should be driven by specific business needs.
Signed-in readers can open the original source through BestHub's protected redirect.
This article has been distilled and summarized from source material, then republished for learning and reference. If you believe it infringes your rights, please contactand we will review it promptly.
Programmer DD
A tinkering programmer and author of "Spring Cloud Microservices in Action"
How this landed with the community
Was this worth your time?
0 Comments
Thoughtful readers leave field notes, pushback, and hard-won operational detail here.