单选题View the Exhibit and examine the parameters. User A executes the following command to update the TRANS table： SQL UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT or ROLLBACK command， user B executes the following command onthe TRANS table： SQL ALTER TABLE trans MODIFY （tr_type VARCHAR2（3））； What would happen in this scenario（）A The ALTER TABLE command modifies the column successfully.B The DDL operation gets higher priority and transaction for user a is rolled back.C The ALTER TABLE command waits indefinitely until user a ends the transaction.D The ALTER TABLE command fails after waiting for 60 seconds due to the resource being busy.
单选题
View the Exhibit and examine the parameters. User A executes the following command to update the TRANS table： SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT or ROLLBACK command， user B executes the following command onthe TRANS table： SQL> ALTER TABLE trans MODIFY （tr_type VARCHAR2（3））； What would happen in this scenario（）
A
The ALTER TABLE command modifies the column successfully.
B
The DDL operation gets higher priority and transaction for user a is rolled back.
C
The ALTER TABLE command waits indefinitely until user a ends the transaction.
D
The ALTER TABLE command fails after waiting for 60 seconds due to the resource being busy.
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单选题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？（）Abecause of redo data from redo log fileBbecause of data from database buffer cacheCbecause of data from a temporary tablespaceDbecause of undo data from the undo tablespace
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;
单选题User A executes the following command to update the TRANS table） SQL UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT or ROLLBACK command， user B executes the following command on the TRANS table： SQl ALTER TABLE trans MODIFY （tr_type VARCHAR2 （3））； What would happen in this scenario？（）AThe transaction for user A is rolled back.BThe ALTER TABLE command modifies the column successfully.CThe ALTER TABLE command fails due to the resource being busy.DThe ALTER TABLE command waits until user A ends the transaction.
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To make audit information more productive， the DBA executes the following command before starting an auditoperation： SQL ALTER SYSTEM SET AUDIT_TRAIL=DB，EXTENDED SCOPE=SPFILE； Which statement is true regarding the audit record generated when auditing starts after restarting Thedatabase（）AIt contains only the plan for the SQL statement executed by the user.BIt contains the SQL text executed by the user and the bind variables used with it.CIt contains the plan and statistics associated with the SQL statement executed by the user.DIt contains the plan for the SQL statement executed by the user and the bind variables used with it
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