Steps for migrating from Oracle Database to PostgreSQL

            Step 1: Preparing for Migration

1. Install PostgreSQL on the target system.
2. Create a new PostgreSQL database for the migration.
3. Install the "ora2pg" tool, which is a popular tool used for migrating from Oracle to PostgreSQL.

            Step 2: Exporting Data from Oracle

1. Use the "exp" command in Oracle to export data from the Oracle database into a dump file. For example:

exp <username>/<password>@<oracle_db> file=<export_file>.dmp

            Step 3: Converting Oracle Dump to PostgreSQL Format

1. Use the "ora2pg" tool to convert the Oracle dump file to a PostgreSQL-compatible format. For example:

ora2pg -t SHOW -c <export_file>.dmp -o <output_file>.sql -d <pg_db> -u <pg_user> -p <pg_password>

            Step 4: Creating Tables and Importing Data in PostgreSQL

1. Execute the converted SQL file in PostgreSQL to create tables and import data. For example:

psql -d <pg_db> -U <pg_user> -p <pg_port> -h <pg_host> -f <output_file>.sql

            Step 5: Migrating Stored Procedures, Triggers, and Views

1. Manually convert stored procedures, triggers, and views from Oracle PL/SQL to PostgreSQL PL/pgSQL syntax.
2. Create the converted objects in PostgreSQL using appropriate PostgreSQL syntax.

            Step 6: Testing and Verification

1. Perform thorough testing of the migrated data and functionality to ensure data integrity and application functionality.

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