EDB is an enhanced version of PostgresQL.
Multi-version Concurrency Control (MVCC) Timestamp Ordering
Relational
Supported
Nested Loop Join Hash Join Sort-Merge Join
SQL
Disk-oriented
N-ary Storage Model (Row/Record)
https://www.enterprisedb.com/products/edb-postgres-platform/edb-postgres-advanced-server
https://www.enterprisedb.com/resources/product-documentation
EnterpriseDB
US
2005
EnterpriseDB, EnterpriseDB Advanced Server, Postgres Plus Advanced Server
Commercial
PostgreSQL
Oracle RDBMS, PostgreSQL
https://en.wikipedia.org/wiki/EnterpriseDB