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What is version control and why should analytics code use it?
Version control, usually Git, records every change to code with who made it and why, and lets you roll back mistakes. Analytics code, such as SQL transformations, benefits because metric logic changes over time and you need to trace and review those changes.
Benefits for analytics:
- Reviewing changes before they affect reports
- Restoring a previous working version
- Collaborating without overwriting each other
- Keeping a history of definition changes
It also supports the client owning the code, since the repository can be handed over complete with history. Even a team of one benefits, since the history protects against accidental breakages and unexplained changes in reported figures.
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