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STSagar Thosarsagarthosar.hashnode.devMay 20 · 19 min read

Oracle to AWS PostgreSQL: The Migration Gotchas Nobody Puts in the Runbook

The full load finished - Row counts matched -DMS showed zero errors. The team went home feeling like the hard part was over. By 9 AM, the application was throwing errors nobody had seen before. Querie

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DDeploynixdeploynix.hashnode.devApr 17 · 9 min read

Recovering From a Failed Database Migration in Production

You deploy your latest release. The deployment log is scrolling through your hooks, and then you see it: SQLSTATE[42S21]: Column already exists or worse, the migration runs halfway through and the process times out. Your database is now in a partiall...

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PPPayal Porwalcodeswithpayal.hashnode.devFeb 24 · 5 min read

Master the Top SQL Queries: Clear Explanations + Practical Examples

1️⃣ SELECT (Basic Data Fetching) 🔹 What it does: Fetch data from a table. 🔹 Syntax: SELECT column1, column2 FROM table_name; 🔹 Example: SELECT name, salary FROM employees; 🔹 Use Case: Showing u

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DCDanny Crastoblog.danwald.meJan 23 · 1 min read

Missing initial migration

Using the Flask-Migrate extension you can create database migrations for your application. Flask application’s typically auto-create db tables on start So running flask db upgrade you’ll get: INFO [alembic.env] No changes in schema detected. To cr...

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LLeenarexriyajo.hashnode.devDec 11, 2025 · 3 min read

What are the steps to migrate from Oracle to PostgreSQL quickly?

Migrating from Oracle to PostgreSQL offers significant cost advantages, improved flexibility, and freedom from vendor lock-in. By following a structured approach, enterprises can complete database modernization in weeks instead of months. This articl...

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JOJohanan Oppong Amoatengjohananoppongamoateng.hashnode.devNov 29, 2025 · 6 min read

Rebuilding a Legacy PHP/MySQL Application in Django: Lessons From My First Legacy Database Migration

Rebuilding a legacy system sounds straightforward until you’re inside it. I was recently contracted to rebuild an old PHP/MySQL application using Django. What made it particularly interesting was that this was my first time ever migrating a legacy da...

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VGVidisha Gawasopensourcegirl.hashnode.devNov 11, 2025 · 3 min read

Building Backend Support for CompilerPlugin Artifacts in Scaladex

Following the successful integration of CompilerPlugin support in Scala models, the next critical step in my GSoC 2025 project was implementing backend indexing for these artifacts. Compiler plugins are an essential part of the Scala ecosystem, and p...

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RGRyan Giggsryan-giggs.hashnode.devOct 28, 2025 · 11 min read

Migrating to Oracle Autonomous Database: Methods, Tools, and Best Practices

Migrating to Oracle Autonomous Database requires careful planning, appropriate tool selection, and adherence to best practices. Oracle provides multiple migration methods and tools designed for different scenarios, from simple data loads to complex z...

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RGRyan Giggsryan-giggs.hashnode.devSep 16, 2025 · 7 min read

Oracle Database Upgrades and Migrations: Essential Best Practices Guide

Database upgrades and migrations are critical operations that require careful planning, execution, and validation. Whether you're modernizing your infrastructure, moving to the cloud, or upgrading to leverage new features, following proven best pract...

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MMMounir Messelmeniblog.mounirmesselmeni.deJul 2, 2025 · 4 min read

Zero Down Time DB migrations with Django

Avoiding Downtime in Django Migrations with django-migration-linter Deploying Django apps with zero downtime is essential in modern production systems, especially when rolling out updates on Kubernetes or deploying worker-based systems incrementally....

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#database-migrations

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Trending tags this week

Oracle to AWS PostgreSQL: The Migration Gotchas Nobody Puts in the Runbook

Recovering From a Failed Database Migration in Production

Master the Top SQL Queries: Clear Explanations + Practical Examples

Missing initial migration

What are the steps to migrate from Oracle to PostgreSQL quickly?

Rebuilding a Legacy PHP/MySQL Application in Django: Lessons From My First Legacy Database Migration

Building Backend Support for CompilerPlugin Artifacts in Scaladex

Migrating to Oracle Autonomous Database: Methods, Tools, and Best Practices

Oracle Database Upgrades and Migrations: Essential Best Practices Guide

Zero Down Time DB migrations with Django