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【单项选择题】

Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:<br /> EMPLOYEES<br /> EMPLOYEE_ID NUMBER Primary Key<br /> FIRST_NAME VARCHAR2 (25)<br /> LAST_NAME VARCHAR2 (25)<br /> HIRE_DATE DATE<br /> NEW EMPLOYEES<br /> EMPLOYEE_ID NUMBER Primary Key<br /> NAME VARCHAR2 (60)<br /> Which DELETE statement is valid?（）<p> Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:<br /> EMPLOYEES<br /> EMPLOYEE_ID NUMBER Primary Key<br /> FIRST_NAME VARCHAR2 (25)<br /> LAST_NAME VARCHAR2 (25)<br /> HIRE_DATE DATE<br /> NEW EMPLOYEES<br /> EMPLOYEE_ID NUMBER Primary Key<br /> NAME VARCHAR2 (60)<br /> Which DELETE statement is valid?（）</p>

A、A. DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);

B、B. DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);

C、C. DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = ('Carrey')'

D、D. DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE last_ name = ('Carrey')'

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更多“Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:<br /> EMPLOYEES<br /> EMPLOYEE_ID NUMBER Primary Key<br /> FIRST_NAME VARCHAR2 (25)<br /> LAST_NAME VARCHAR2 (25)<br /> HIRE_DATE DATE<br /> NEW EMPLOYEES<br /> EMPLOYEE_ID NUMBER Primary Key<br /> NAME VARCHAR2 (60)<br /> Which DELETE statement is valid?（）<p> Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:<br /> EMPLOYEES<br /> EMPLOYEE_ID NUMBER Primary Key<br /> FIRST_NAME VARCHAR2 (25)<br /> LAST_NAME VARCHAR2 (25)<br /> HIRE_DATE DATE<br /> NEW EMPLOYEES<br /> EMPLOYEE_ID NUMBER Primary Key<br /> NAME VARCHAR2 (60)<br /> Which DELETE statement is valid?（）</p>”相关的问题
第1题
[] Examine the structure of the EMPLOYEES table: You need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below: Which UPDATE statement meets the requirements?（） Examine the structure of the EMPLOYEES table: You need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below: Which UPDATE statement meets the requirements?（）

A、A.
B.
C.
D.
E.  

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第2题
[] Click the Exhibit button to examine the structures of the EMPLOYEES, DEPARTMENTS, and TAX tables. For which situation would you use a nonequijoin query?（） Click the Exhibit button to examine the structures of the EMPLOYEES, DEPARTMENTS, and TAX tables. For which situation would you use a nonequijoin query?（）

A、A.to find the tax percentage for each of the employees  B、B.to list the name, job_id, and manager name for all the employees  C、C.to find the name, salary, and the department name of employees who are not working with Smith  D、D.to find the number of employees working for the Administrative department and earning less than 4000  E、E.to display name, salary, manager ID, and department name of all the employees, even if the employees do not have a department ID assigned  

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第3题
[] Click the Exhibit button to examine the structures of the EMPLOYEES, DEPARTMENTS, and TAX tables. For which situation would you use a nonequijoin query?（） Click the Exhibit button to examine the structures of the EMPLOYEES, DEPARTMENTS, and TAX tables. For which situation would you use a nonequijoin query?（）

A、A.to find the tax percentage for each of the employees  B、B.to list the name, job_id, and manager name for all the employees  C、C.to find the name, salary, and the department name of employees who are not working with Smith  D、D.to find the number of employees working for the Administrative department and earning less than 4000  E、E.to display name, salary, manager ID, and department name of all the employees, even if the employees do not have a department ID assigned  

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第4题
[填空题] The three main things that a learner has to acquire when learning a new structure are the form, meaning and（）of the structure.

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第5题
[单选题] A data manipulation language statement （）.

A、completes a transaction on a table  B、modifies the structure and data in a table  C、modifies the data but not the structure of a table  D、modifies the structure but not the data of a table  

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第6题
[单选题] A data manipulation language statement （）.

A、completes a transaction on a table  B、modifies the structure and data in a table  C、modifies the data but not the structure of a table  D、modifies the structure but not the data of a table  

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第7题
[单选题] Examine the structure of the EMPLOYEES table: You issue these statements: At the end of this transaction, what is true?（）

A、You have no rows in the table.  B、You have an employee with the name of James.  C、You cannot roll back to the same savepoint more than once.  D、Your last update fails to update any rows because employee ID 180 was already eleted.  

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第8题
[单选题] Which organizations can post to the same set of books?（）

A、those organizations that share the same functional currency, calendar and accounting flexfield structure  B、those organizations that share the same currency but do not share the same calendar and accounting flexfield structure  C、those organizations that share the same accounting flexfield structure but do not share the same calendar and functional currency  D、those organizations that share the same calendar but do not share the same functional currency and accounting flexfield structure  

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第9题
[单选题] You have a server that runs Windows Server 2003 Service Pack 2 (SP2). An incremental backup runs every weekday at 01:00. On Friday, you examine the Windows Backup log and discover that the last entry in the log is one week old. You need to identify the problem that prevents the backup from running. What should you do? （）

A、From Scheduled Tasks, examine the log.  B、From Event Viewer, examine the system log.  C、From Windows Backup, enable detailed logging and then perform a manual backup.  D、From Windows Explorer, examine the files in the %systemroot%\system32\LogFiles folder.  

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第10题
[单选题] Your network consists of a single Active Directory domain that contains two domain controllers. Both domain controllers run Windows Server 2003 Service Pack 2 (SP2). Auditing of successful account logon events is enabled on all computers in the domain. You need to identify the last time a specific user logged on to the domain. What should you do?（）

A、Examine the System Event Log on the user’s computer.  B、Examine the System Event Log on both domain controllers.  C、Examine the Security Event Log on both domain controllers.  D、Examine the Application Event Log on the user’s computer.  

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