Oracle, MySQL, SQL Server and PostgreSQL hold the top four relational database spots in the October 2026 DB-Engines ranking.
PostgreSQL scored 688.75, up 45.56 points year over year, while the other three top systems lost points.
In our test on a 2-million-row table, one index cut a PostgreSQL lookup from about 31 ms to about 0.09 ms.
SQLite allows one writer at a time, so team apps with many concurrent writers suit client-server systems.