How to Version-Control PostgreSQL Queries

Galaxy Glossary

How do I version-control PostgreSQL SQL queries with Git?

Create, track, and collaborate on PostgreSQL SQL files safely with Git.

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Description

Why version-control PostgreSQL queries?

Version control keeps every change to a query visible, reversible, and attributable—crucial for audits and team collaboration.

How do I store SQL queries in Git?

Create a dedicated sql/ folder in your repo. Save each query as a .sql file named after its purpose, e.g., orders/total_revenue.sql.

Step-by-step

1) Initialize Git in your project. 2) Add the sql/ directory. 3) Commit files with descriptive messages. 4) Open pull requests for review.

What is the recommended file structure?

Group by domain: sql/customers/, sql/orders/, sql/products/.Include a README that explains dependencies and expected result sets.

How to apply a versioned query?

Load the file with psql -d $DB -f sql/orders/total_revenue.sql or from Galaxy’s run-file feature. Parameterize using :start_date and :end_date for repeatable runs.

Best practices for versioned SQL

Keep queries idempotent by wrapping DML in transactions. Use comments for context. Store test results in CI to prevent regressions.

Common mistakes and how to avoid them

Do not embed ad-hoc SQL only in application code; store it in .sql files.Always review diffs for whitespace-only changes to avoid noisy commits.

Summary

Version-controlling SQL promotes code quality, speeds onboarding, and aligns teams—especially when paired with Galaxy’s sharing and endorsement workflow.

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Why How to Version-Control PostgreSQL Queries is important

How to Version-Control PostgreSQL Queries Example Usage


-- File: sql/orders/total_revenue.sql
SELECT DATE(order_date) AS order_day,
       SUM(total_amount)   AS daily_revenue
FROM   Orders
WHERE  order_date BETWEEN :'start_date' AND :'end_date'
GROUP  BY order_day
ORDER  BY order_day;

How to Version-Control PostgreSQL Queries Syntax


-- Folder structure example
sql/
  customers/
    new_signups.sql
  orders/
    total_revenue.sql

-- Run a version-controlled query
psql -d ecommerce_db -v start_date="2024-01-01" -v end_date="2024-01-31" \
     -f sql/orders/total_revenue.sql

Common Mistakes

Frequently Asked Questions (FAQs)

Can I use branches for experimental queries?

Yes. Create a feature branch, push your .sql changes, and merge after review to keep main clean.

How do I track changes to database objects?

Save DDL scripts (CREATE/ALTER) alongside queries and run them through migrations tools like Flyway or Sqitch.

Want to learn about other SQL terms?