Free tools to migrate from Oracle to PostgreSQL

Migrating from Oracle to PostgreSQL can be complex, but there are several **free AI-powered or automated tools** that can simplify the process. Below is a list of **free tools** that can assist with Oracle to PostgreSQL migration, along with their key features: --- ### **1. ora2pg** - **Description:** A free, open-source Perl script that automates the migration of Oracle databases to PostgreSQL. - **Key Features:** - Converts Oracle schemas, tables, indexes, and constraints to PostgreSQL. - Migrates data with minimal manual intervention. - Supports PL/SQL to PL/pgSQL conversion. - Generates migration reports and estimates. - **Website:** [ora2pg](https://ora2pg.darold.net/) --- ### **2. AWS Schema Conversion Tool (SCT)** - **Description:** A free tool from AWS that helps convert database schemas and code between heterogeneous databases, including Oracle to PostgreSQL. - **Key Features:** - Automates schema and code conversion. - Identifies manual intervention points for unsupported features. - Integrates with AWS Database Migration Service (DMS) for data migration. - Provides assessment reports for migration complexity. - **Website:** [AWS SCT](https://aws.amazon.com/database-migration/schema-conversion-tool/) --- ### **3. pgloader** - **Description:** A free, open-source data loading tool that can migrate data from Oracle to PostgreSQL. - **Key Features:** - Supports high-speed data migration. - Handles data type conversions automatically. - Can migrate large datasets with minimal downtime. - Works with live databases or dump files. - **Website:** [pgloader](https://pgloader.io/) --- ### **4. Foreign Data Wrapper (oracle_fdw)** - **Description:** A PostgreSQL extension that allows you to query Oracle databases directly from PostgreSQL. - **Key Features:** - Enables incremental data migration by querying Oracle data in real-time. - Useful for testing and validation during migration. - Requires Oracle Instant Client for connectivity. - **Website:** [oracle_fdw](https://github.com/laurenz/oracle_fdw) --- ### **5. DataDiff** - **Description:** A free tool for comparing data between Oracle and PostgreSQL databases. - **Key Features:** - Validates data integrity after migration. - Identifies discrepancies in row counts, checksums, and sample data. - Useful for post-migration testing. - **Website:** [DataDiff](https://github.com/datafold/data-diff) --- ### **6. OpenDBDiff** - **Description:** A free, open-source tool for comparing and synchronizing database schemas. - **Key Features:** - Compares Oracle and PostgreSQL schemas to identify differences. - Generates synchronization scripts. - Useful for schema validation during migration. - **Website:** [OpenDBDiff](https://github.com/OpenDBDiff/OpenDBDiff) --- ### **7. Pentaho Data Integration (Kettle)** - **Description:** A free, open-source ETL (Extract, Transform, Load) tool that can be used for data migration. - **Key Features:** - Extracts data from Oracle and loads it into PostgreSQL. - Supports data transformation and cleansing during migration. - Provides a graphical interface for designing migration workflows. - **Website:** [Pentaho](https://sourceforge.net/projects/pentaho/) --- ### **8. Talend Open Studio** - **Description:** A free, open-source data integration tool that supports Oracle to PostgreSQL migration. - **Key Features:** - Provides pre-built connectors for Oracle and PostgreSQL. - Supports data transformation and validation. - Offers a graphical interface for designing migration jobs. - **Website:** [Talend](https://www.talend.com/products/talend-open-studio/) --- ### **9. pgTAP** - **Description:** A free, open-source testing framework for PostgreSQL. - **Key Features:** - Automates database testing, including schema and data validation. - Useful for post-migration testing and validation. - **Website:** [pgTAP](https://pgtap.org/) --- ### **10. DBeaver** - **Description:** A free, open-source database tool that supports both Oracle and PostgreSQL. - **Key Features:** - Allows manual data migration through export/import functionality. - Provides SQL scripting and querying capabilities. - Useful for ad-hoc data transfers and testing. - **Website:** [DBeaver](https://dbeaver.io/) --- ### **11. Liquibase** - **Description:** A free, open-source database schema migration tool. - **Key Features:** - Tracks and manages database schema changes. - Supports Oracle and PostgreSQL. - Useful for incremental schema migration. - **Website:** [Liquibase](https://www.liquibase.org/) --- ### **12. Flyway** - **Description:** A free, open-source database migration tool. - **Key Features:** - Manages schema migrations using version control. - Supports Oracle and PostgreSQL. - Useful for incremental schema migration. - **Website:** [Flyway](https://flywaydb.org/) --- ### **How These Tools Can Help** - **Automation:** Reduce manual effort in schema and data migration. - **Accuracy:** Ensure data integrity and schema compatibility. - **Cost Savings:** Leverage free tools to minimize migration costs. - **Flexibility:** Combine tools for a customized migration approach. --- ### **Recommended Workflow** 1. **Assessment:** Use **AWS SCT** or **ora2pg** to assess migration complexity. 2. **Schema Conversion:** Use **ora2pg** or **AWS SCT** for schema conversion. 3. **Data Migration:** Use **pgloader** or **AWS DMS** for data transfer. 4. **Validation:** Use **DataDiff** or **pgTAP** for data and schema validation. 5. **Testing:** Use **DBeaver** or **Talend** for application testing. --- These free tools can significantly simplify the Oracle to PostgreSQL migration process. Let me know if you need help setting up or using any of these tools! 😊

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