1z0-043
单选题You are working as a DBA at NetFx Corporation. A user， Scott， is maintaining the records of all the employees in the EMPLOYEEtable. Initially， the salary of the employee， ’E0025’， was $1800. On 1 May 2004， the salary of the employee， ’E0025’， was incre
题目
Flashback Drop
Flashback Table
Flashback Database
Flashback Version Query
相似问题和答案
第1题：
YouareworkingasaDBAatNetFxCorporation.Auser，Scott，ismaintainingtherecordsofalltheemployeesintheEMPLOYEEtable.Initially，thesalaryoftheemployee，’E0025’，was$1800.On1May2004，thesalaryoftheemployee，’E0025’，wasincreasedby$200.
Theuser，Scott，issuedthefollowingstatementtomodifytherecordoftheemployee，’E0025’：
SQL>UPDATEEMPLOYEESETSALARY=2000
WHEREEMPNO=’E0025’；
SQL>COMMIT；
OnDecember1，2004，thesalaryoftheemployee，’E0025’，wasincreasedby$400.Theuser，Scott，issuedthefollowingstatementtomodifytherecordoftheemployee，’E0025’：
SQL>UPDATEEMPLOYEESETSALARY=2400
WHEREEMPNO=’E0025’；
SQL>COMMIT；
OnJuly1，2005，thesalaryoftheemployee，’E0025’，wasincreasedby$500.Theuser，Scott，issuedthefollowingstatementtomodifytherecordoftheemployee，’E0025’
SQL>UPDATEEMPLOYEESETSALARY=2900
WHEREEMPNO=’E0025’；
SQL>COMMIT；
OnJuly5，2005，theHRmanageraskedyoutogeneratetheincrementreportoftheemployee，’E0025’，fortheperiodbetween1May2004and1July2005.Whichflashbackfeaturewillyouusetogeneratetheincrementreport？（）
第2题：
A. The statement produces an error at line 1.
B. The statement produces an error at line 3.
C. The statement produces an error at line 6.
D. The statement returns the employee name, salary, department ID, and maximum salary earned in the department of the employee for all departments that pay less salary then the maximum salary paid in the company.
E. The statement returns the employee name, salary, department ID, and maximum salary earned in the department of the employee for all employees who earn less than the maximum salary in their department.
第3题：
A. You want to identify the most senior employee in the company.
B. You want to find the manager supervising the largest number of employees.
C. You want to identify the person who makes the highest salary for all employees.
D. You want to rank the top three sales representatives who have sold the maximum number of products.
第4题：
You are working as a DBA at NetFx Corporation. A user， Scott， is maintaining the records of all the employees in the EMPLOYEEtable. Initially， the salary of the employee， ’E0025’， was $1800. On 1 May 2004， the salary of the employee， ’E0025’， was increased by $200. The user， Scott， issued the following statement to modify the record of the employee， ’E0025’： SQL>UPDATE EMPLOYEE SET SALARY = 2000 WHERE EMPNO = ’E0025’； SQL>COMMIT； On December 1， 2004， the salary of the employee， ’E0025’， was increased by $400. The user， Scott， issued the following statement to modify the record of the employee， ’E0025’： SQL>UPDATE EMPLOYEE SET SALARY = 2400 WHERE EMPNO = ’E0025’； SQL>COMMIT； On July 1， 2005， the salary of the employee， ’E0025’， was increased by $500. The user， Scott， issued the following statement to modify the record of the employee， ’E0025’ SQL>UPDATE EMPLOYEE SET SALARY = 2900 WHERE EMPNO = ’E0025’； SQL>COMMIT； On July 5， 2005， the HR manager asked you to generate the increment report of the employee， ’E0025’， for the period between 1 May 2004 and 1 July 2005. Which flashback feature will you use to generate the increment report？（）
- A、 Flashback Drop
- B、 Flashback Table
- C、 Flashback Database
- D、Flashback Version Query
正确答案:D
第5题：
Click the Exhibit button to examine the data of the EMPLOYEES table.Which statement lists the ID, name, and salary of the employee, and the ID and name of the employee‘s manager, for all the employees who have a manager and earn more than 4000?（）
A.SELECT employee_id "Emp_id", emp_name "Employee", salary, employee_id "Mgr_id", emp_name "Manager" FROM employees WHERE salary > 4000;
B.SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.employee_id "Mgr_id", m.emp_name "Manager" FROM employees e JOIN employees m WHERE e.mgr_id = m.mgr_id AND e.salary > 4000;
C.SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.employee_id "Mgr_id", m.emp_name "Manager" FROM employees e JOIN employees m ON (e.mgr_id = m.employee_id) AND e.salary > 4000;
D.SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.mgr_id "Mgr_id", m.emp_name "Manager" FROM employees e SELF JOIN employees m WHERE e.mgr_id = m.employee_id AND e.salary > 4000;
E.SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.mgr_id "Mgr_id" m.emp_name "Manager" FROM employees e JOIN employees m USING (e.employee_id = m.employee_id) AND e.salary > 4000;
第6题：
Examine the data of the EMPLOYEES table.EMPLOYEES (EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID)Which statement lists the ID, name, and salary of the employee, and the ID and name of the employee‘s manager, for all the employees who have a manager and earn more than 4000?（）
A.
B.
C.
D.
E.
第7题：
Click the Exhibit button to examine the data of the EMPLOYEES table. Evaluate this SQL statement:SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.employee_id "Mgr_id", m.emp_name "Manager"FROM employees e JOIN employees m ON (e.mgr_id = m.employee_id)AND e.salary > 4000;What is its output?（）
A.A
B.B
C.C
D.D
E.E
第8题：
The EMPLOYEE tables has these columns:LAST_NAME VARCHAR2(35)SALARY NUMBER(8,2)COMMISSION_PCT NUMBER(5,2)You want to display the name and annual salary multiplied by the commission_pct for all employees. For records that have a NULL commission_pct, a zero must be displayed against the calculated column.Which SQL statement displays the desired results? （）
A. SELECT last_name, (salary * 12) * commission_pct FROM EMPLOYEES;
B. SELECT last_name, (salary * 12) * IFNULL(commission_pct, 0) FROM EMPLOYEES;
C. SELECT last_name, (salary * 12) * NVL2(commission_pct, 0) FROM EMPLOYEES;
D. SELECT last_name, (salary * 12) * NVL(commission_pct, 0) FROM EMPLOYEES;
第9题：
您在公司的数据库中成功创建了名为SALARY的表。您现在要通过向引用EMPLOYEES表的匹配列的SALARY表添加FOREIGNKEY约束条件来建立EMPLOYEES表与SALARY表之间的父/子关系。尚未向SALARY表添加任何数据。应执行以下哪条语句（）
- A、ALTER TABLE salary ADD CONSTRAINT fk_employee_id_01 FOREIGN KEY（employee_id）REFERENCES employees（employee_id）
- B、ALTER TABLE salary ADD CONSTRAINT fk_employee_id_ FOREIGN KEY BETWEEN salary（employee_id）AND employees（employee_id）
- C、ALTER TABLE salary FOREIGN KEY CONSTRAINT fk_employee_id_REFERENCES employees（employee_id）
- D、ALTER TABLE salary ADD CONSTRAINT fk_employee_id_FOREIGN KEY salary（employee_id）=employees（employee_id）
正确答案:A
第10题：
In which scenario would TOP N analysis be the best solution? （）
- A、You want to identify the most senior employee in the company.
- B、You want to find the manager supervising the largest number of employees.
- C、You want to identify the person who makes the highest salary for all employees.
- D、You want to rank the top three sales representatives who have sold the maximum number of products.
正确答案:D