To avoid conflicts with existing Oracle instances on a developer's machine, XE defaulted to non-standard ports:

While Oracle Database XE 10g is a powerful and feature-rich database, it does have some limitations:

One of the standout features bundled with 10g XE was , then known as HTML DB.

While beloved, 10g XE had its share of headaches:

Supports standard programming interfaces, including SQL, PL/SQL, Java, C, and PHP .