单选题A user executes a query on the EMPtable， 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-01157： cannot identify/lock data file 201 - see DBWR trace file ORA-01110： 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 allowedC 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 read-only.
单选题
A user executes a query on the EMPtable， 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-01157： cannot identify/lock data file 201 - see DBWR trace file ORA-01110： 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 read-only.
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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.
A user executes a query on the EMPtable， 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-01157： cannot identify/lock data file 201 - see DBWR trace file ORA-01110： 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 allowedC、 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 read-only.
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多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK，or any data definition language （DDL） command： SQL SELECT job FROM emp 2 WHERE job=’CLERK’ FOR UPDATE OF empno; SCOTT has opened another session to work with the database. Which three operations would wait when issued in SCOTT’s second session？（）ALOCK TABLE emp IN SHARE MODE;BLOCK TABLE emp IN EXCLUSIVE MODE;CDELETE FROM emp WHERE job=’MANAGER’;DINSERT INTO emp（empno，ename） VALUES （1289，’Dick’）;ESELECT job FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno;
多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， or any data definition language （DDL） command： SQL SELECT ename FROM emp 2 WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations wouldwait when issued in SCOTT’s second session（）ALOCK TABLE emp IN SHARE MODE；BLOCK TABLE emp IN EXCLUSIVE MODE；CUPDATE emp SET sal=sal*1.2 WHERE job=MANAGER；DINSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；ESELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno；
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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.
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