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You are working in an online transaction processing (OLTP) environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the System Change Number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state and the resultant changes are not what you had desired. So, you need to reverse the effects of the FLASHBACK TABLE command while ensuring that: 
a) No other user data in the database is affected. 
b) The operation takes the minimum possible time. 
Which option would you choose?()

A . use the ROLLBACK command with SCN 663571
B . perform Flashback Transaction Query with SCN 663571
C . execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
D . execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE Which INSERT statement is valid? () INSERT INTO employees (employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01/01/01);。 INSERT INTO employees(employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01 january 01');。 INSERT INTO employees(employee_id, first_name, last_name, Hire_date) VALUES (1000, 'John', 'smith', To_ date ('01/01/01));。 INSERT INTO employees(employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01-Jan-01')。 主阀大膜板活塞上方通列车管压力,下方通()压力。 降压风缸。 工作风缸。 均衡风缸。 紧急风缸。 Your database is started by using the server parameter file (SPFILE). You issued this command to change the value of the LOG_BUFFER initialization parameter:  ALTER SYSTEM SET LOG_BUFFER=24M SCOPE=BOTH;  What would be the outcome of this command?() The command would return an error because LOG_BUFFER is a static parameter.。 The parameter value would be changed and it would come into effect immediately.。 You need to restart the database so that parameter changes can come into effect.。 The command would succeed only if initialization parameter LOG_ARCHIVE_MAX_PROCESS is set to value 2.。 Given: What is the result?() test。 Exception。 Compilation fails.。 NullPointerExceptio。 体育教学中学生产生错误动作的原因之一是教育心理因素,其主要表现在学生的()和()没有达到相应的水平等。

You are working in an online transaction processing (OLTP) environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the System Change Number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state and the resultant changes are not what you had desired. So, you need to reverse the effects of the FLASHBACK TABLE command while ensuring that: 
a) No other user data in the database is affected. 
b) The operation takes the minimum possible time. 
Which option would you choose?()

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