PostgreSQL

Step 1: Download
https://www.enterprisedb.com/downloads/postgres-postgresql-downloads#macosx

Step 2: use pgadmin to connect to PostgreSQL
https://www.pgadmin.org/

Other UI Tools: https://postgresapp.com/documentation/gui-tools.html

Step 3: Oracle vs PostgreSQl data types.
http://www.sqlines.com/oracle-to-postgresql

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