单选题A user executes a query on the EMP table， which contains thousands of rows， to get details about employees in one of the departments. The user receives the following error： SQL SELECT ename FROM emp WHERE deptno=10 ORDER BY sal; SELECT ename FROM emp WHERE deptno=10 ORDER BY sal * ERROR at line 1： ORA/x7f01157： cannot identify/lock data file 201 /x7f see DBWR trace file ORA/x7f01110： data file 201： ’/u01/app/oracle/oradata/orcl/temp01.dbf’ What is a possible reason？（）AThe tempfile belonging to the default temporary tablespace is missing.BThe database is opened in restricted mode， so queries are not allowed.CThe default temporary tablespace required to execute the query is offline.DThe default temporary tablespace required to execute the query is dropped.EThe default temporary tablespace required to execute the query is readonly.
单选题
A user executes a query on the EMP table， which contains thousands of rows， to get details about employees in one of the departments. The user receives the following error： SQL> SELECT ename FROM emp WHERE deptno=10 ORDER BY sal; SELECT ename FROM emp WHERE deptno=10 ORDER BY sal * ERROR at line 1： ORA/x7f01157： cannot identify/lock data file 201 /x7f see DBWR trace file ORA/x7f01110： data file 201： ’/u01/app/oracle/oradata/orcl/temp01.dbf’ What is a possible reason？（）
A
The tempfile belonging to the default temporary tablespace is missing.
B
The database is opened in restricted mode， so queries are not allowed.
C
The default temporary tablespace required to execute the query is offline.
D
The default temporary tablespace required to execute the query is dropped.
E
The default temporary tablespace required to execute the query is readonly.
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