1. Oracle and partners will hold a 45% stake in a TikTok joint venture. 2. The deal aims to alleviate U.S. national security concerns over TikTok. 3. ByteDance retains a 20% stake; deal expected to close on January 22. 4. Oracle's shares rose over 5% following TikTok joint venture news. 5. The agreement follows a long push for TikTok's American ownership.