1. 連接數據庫：db2 connect to study

2. 查詢當前用戶模式：select current schema from sysibm.sysdummy1 或 select current schema from sysibm.dual

3. 切換用戶模式：set current schema toms

4. 切換用戶： db2 connect to cpsdb user Administrator using 111111

5. 給其他用戶授權：db2 grant dbadm on database to user odsuser

6. 查看當前用戶的權限： db2 get authorizations