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The EMPLOYEES table has six indexes and DML operations are slow. Which command begins monitoring the EMPLOYEE_IDX_FK index to determine whether it has been used by an execution plan？（）
- A、ALTER TABLE employees monitor index employee_idx_fk;
- B、ALTER INDEX employee_idx_fk monitoring on;
- C、ALTER TABLE employees monitor all indexes;
- D、ALTER INDEX employee_idx_fk monitoring usage;
参考答案
更多 “The EMPLOYEES table has six indexes and DML operations are slow. Which command begins monitoring the EMPLOYEE_IDX_FK index to determine whether it has been used by an execution plan？（）A、ALTER TABLE employees monitor index employee_idx_fk; B、ALTER INDEX employee_idx_fk monitoring on; C、ALTER TABLE employees monitor all indexes; D、ALTER INDEX employee_idx_fk monitoring usage; ” 相关考题
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Only the EMPLOYEES table.B
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The EMPLOYEES table and partition P1.D
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单选题You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform?（）A
MERGEB
INSERTC
UPDATED
ADDE
ENTERF
You cannot enter the phone numbers for the existing employee records.
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Grant the new employees the Allow Full control permission.B
Grant the new employees the Allow Access Dial-in permission.C
Add the new employees to the Remote Desktop Users security group.D
Add the new employees to the Windows Authorization Access security group.
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多选题Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) Which three statements inserts a row into the table? （）AINSERT INTO employees VALUES (NULL, 'JOHN','Smith');BINSERT INTO employees( first_name, last_name) VALUES ('JOHN','Smith');CINSERT INTO employees VALUES ('1000','JOHN','NULL');DINSERT INTO employees(first_name,last_name, employee_id) VALUES ('1000, 'john','Smith');EINSERT INTO employees (employee_id) VALUES (1000);FINSERT INTO employees (employee_id, first_name, last_name) VALUES ( 1000, 'john',);
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单选题Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2 (25) LAST_NAME VARCHAR2 (25) HIRE_DATE DATE NEW EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2 (60) Which DELETE statement is valid? （）A
DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);B
DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);C
DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = ('Carrey')'D
DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE last_ name = ('Carrey')'
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单选题In the passage, the following advantages of casual office wear are mentioned EXCEPT _____.A
saving employees’ moneyB
making employees more attractiveC
improving employees’ motivationD
making employees happier
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问答题MegaTech and UltraCorp are considering a merger to form the MegaUltraTech Corporation. Does MegaTech have more employees than UltraCorp? (1) The average (arithmetic mean) age of UltraCorp employees is 32.8, while the average age of MegaTech employees is 27.2. (2) If the merger goes through and all employees from both companies remain employed, the average (arithmetic mean) age of the MegaUltraTech employees will be 31.4.
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