MergeStat is an open-source tool that allows users to run SQL queries on code and configuration files, effectively treating them like a database to enhance the software development lifecycle (SDLC) by gaining insights across various codebases and teams. Originally known as Gitqlite, MergeStat combines SQLite and Git to streamline querying historical data in code repositories. DevZero is a cloud-based platform that provides developers with the ability to quickly create and manage development environments resembling production settings, facilitating faster and more confident code deployment. When used together, MergeStat and DevZero enable developers to calculate metrics and analyze data efficiently by setting up a MergeStat environment within DevZero, syncing data from Git repositories, and utilizing pre-populated queries. The combination of these tools helps teams gain insights into productivity and performance, and developers interested in contributing to MergeStat can do so through DevZero's environment by following the provided guidelines.