单项选择题 Your alert log file has the following information： Tue May 25 17：43： 38 2004  ORA-00060： Deadlock detected. More info in file /u01/app/oracle/admin/ORCL/udump/orcl_ora_3173.trc.  What would you do to ensure that database is still running correctly？（）

单项选择题 Youspecifiedsegmentspacemanagementasautomaticforatablespace.Whateffectwouldthishaveonspacemanagement？（）

单项选择题 The user SCOTT executes the following command successfully to increase the salary values in one of his sessions：  SQL> UPDATE emp SET sal=sal*1.15 WHERE deptno=20；  Before SCOTT ends the transaction， user HR who has the privileges on EMP table executes a query to fetch the salary details but finds the old salary values instead of the increased values. Why does HR still see the old data？（）