http://www.oracle.com/technology/xe/index.html
http://www.oracle.com/technology/products/database/xe/pdf/dbxe_faq.pdf
Can I use Oracle Database XE for free deployment?
Oracle Database XE is free for runtime usage with the following limitations:
• Supports up to 4GB of user data (in addition to Oracle system data)
• Single instance only of Oracle Database XE on any server
• May be installed on a multiple CPU server, but only executes on one processor in any server
• May be installed on a server with any amount of memory, but will only use up to 1GB RAM of available memory
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プレスリリースのサポートプラットフォーム
Oracle Database XE is generally available on 32-bit Windows and a wide range of Linux operating systems including Mandriva Linux 2006 Power Pack+, Novell's SUSE Linux Enterprise Server 9 and SUSE Linux 10, Red Hat Enterprise Linux 4, Fedora and Ubuntu.
うーん。この微妙なリストは...
Oracle Database XEの主な特徴と制限事項
http://d.hatena.ne.jp/satonaoki/20051101
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