--- title: "Oracle & SQL Server to PostgreSQL | Axio Intelligence" description: "Migrate Oracle and SQL Server databases to PostgreSQL or MySQL on AWS, Azure or Google Cloud: schema and stored-procedure conversion, data sync and cutover." url: https://axiointelligence.com/services/database-migration/ --- # Database migration Axio Intelligence migrates legacy Oracle and Microsoft SQL Server databases to PostgreSQL or MySQL — self-managed, or on Amazon RDS and Aurora, Google Cloud SQL and AlloyDB, or Azure Database. We convert schemas, PL/SQL and T-SQL stored procedures and application queries, keep old and new in sync during the move, and cut over with a rollback path, so you stop paying per-core license fees without a risky big-bang weekend. [Scope your project](https://axiointelligence.com/book/) ## You probably need this if… - Oracle or SQL Server licensing is one of the biggest lines in the IT budget, and a renewal or audit is coming. - Business logic lives in thousands of lines of PL/SQL or T-SQL that nobody wants to touch. - You’re moving to the cloud and don’t want to carry the old license with you. - Your team already runs Postgres or MySQL elsewhere and wants one database to support. ## What you get ### Assessment Schema, code and query inventory: what converts cleanly, what needs rewriting, and license and hosting cost before and after. ### Schema & code conversion Tables, types, indexes, stored procedures, triggers and packages converted to PostgreSQL or MySQL, with tests for every converted routine. ### Data migration & sync Bulk load plus change data capture, so old and new stay in sync until cutover. ### Cutover & rollback Application changes, tuning against production-sized data, and a tested rollback plan. ## What we work in PostgreSQL, MySQL, Oracle (PL/SQL), SQL Server (T-SQL), Amazon RDS / Aurora, Cloud SQL / AlloyDB, Azure Database for PostgreSQL / MySQL, AWS DMS & Schema Conversion, Debezium (CDC), ora2pg, pgloader, Terraform / OpenTofu Named platforms and standards describe what we build with and build to; they don’t imply a formal partnership or certification with the vendor. Typical engagement **Shape:** Assessment, then a phased migration per database **Timeline:** Sized after the assessment **Pricing:** Fixed fee or a percentage of the license savings, depending on the job **IP:** You own the code and designs [Book a scoping call](https://axiointelligence.com/book/) ## Industries ### Manufacturing & distribution Manufacturers, distributors and retailers moving off IBM mainframes, IBM i, Oracle and SQL Server. [Manufacturing & distribution](https://axiointelligence.com/industries/manufacturing-distribution/) ### Industrial & remote assets Monitoring and control for oil & gas, water, cold chain and infrastructure. [Industrial & remote assets](https://axiointelligence.com/industries/industrial-remote-assets/) ### Energy & DER devices Make batteries, solar + storage and EV chargers dispatchable. [Energy & DER devices](https://axiointelligence.com/industries/energy-der/) All ### Another sector? The same engineering carries across sectors. See everywhere we work, or bring yours to a scoping call. All industries → [Another sector?](https://axiointelligence.com/industries/) ## Database migration: common questions ### Can you migrate Oracle to PostgreSQL? Yes. We convert the schema and the PL/SQL packages, procedures and triggers to PostgreSQL, move the data with a bulk load and change data capture, and cut over once the application has run against Postgres with production-sized data. ### Can you migrate SQL Server to PostgreSQL or MySQL? Yes. T-SQL procedures, functions and triggers are converted and tested routine by routine, application queries are updated, and data stays in sync until cutover. ### Do we need downtime to switch databases? Usually only a short cutover window. Change data capture keeps the new database current while the application is tested against it, and the old database stays available as a rollback until you are confident. ### PostgreSQL or MySQL — which should we choose? PostgreSQL is usually the closer fit for Oracle and SQL Server workloads with heavy procedural code, rich types and complex queries. MySQL makes sense when your team already runs it or the workload is simpler. The assessment recommends one based on your code. ### How is database migration priced? Either a fixed fee or a percentage of the license savings, depending on the job. When the goal is getting off Oracle or SQL Server licensing, a share of the savings usually fits; when the migration is part of a wider build, a fixed fee usually does. We recommend one after the assessment. ### Can you migrate Db2 too? Yes. Db2 for z/OS and Db2 for i data moves to PostgreSQL as part of our mainframe and IBM i work, alongside the jobs that read it. Further reading - [Migrating clouds without the migration freeze](https://axiointelligence.com/blog/migration_without_downtime/) - [On an IBM mainframe or IBM i? Mainframe & IBM i migration](https://axiointelligence.com/services/mainframe-migration/) ## Often paired with ### New product line platforms The full platform for a new division: portals, commerce, billing, integrations. [New product line platforms](https://axiointelligence.com/services/product-platforms/) ### Data & AI platforms Data pipelines, labeling workflows and project tooling that feed AI models. [Data & AI platforms](https://axiointelligence.com/services/data-ai-platforms/) ### Performance & legacy modernization Profile, fix, and incrementally rewrite systems that can’t keep up. [Performance & legacy modernization](https://axiointelligence.com/services/legacy-modernization/)