SQL Arena is a project designed to help users compare different database vendors effectively. It aims to provide valuable performance data to inform decisions about database selection for various projects. The site gathers data through a tool called dbprove, which is open-source and allows community contributions. Performance metrics are measured when possible, though some vendors may be excluded based on the DeWitt Clause. The data is organized into components that align with the typical architecture of relational databases. Workloads, such as TPC-H, are used to run queries, followed by a detailed analysis of how the database engines executed them. This analysis includes metrics like runtime breakdowns, query plan shapes, latency measurements, CPU cycle analysis, and I/O details, depending on available instrumentation. Contributions to the project are encouraged, whether by submitting results or contributing code through Pull Requests on DBProve. The site maintains an educational focus, striving for a neutral comparison of databases. Feedback and suggestions can be directed to Thomas Kejser, who is open to improving both the site and its measurement techniques.