单选题Evaluate the SQL statement: 1 SELECT a.emp_name, a.sal, a.dept_id, b.maxsal 2 FROM employees a, 3 (SELECT dept_id, MAX(sal) maxsal 4. FROM employees 5 GROUP BY dept_id) b 6 WHERE a.dept_id = b.dept_id 7 AND a. asl < b. maxsal; What is the result of the

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单选题

Evaluate the SQL statement: 1 SELECT a.emp_name, a.sal, a.dept_id, b.maxsal 2 FROM employees a, 3 (SELECT dept_id, MAX(sal) maxsal 4. FROM employees 5 GROUP BY dept_id) b 6 WHERE a.dept_id = b.dept_id 7 AND a. asl < b. maxsal; What is the result of the statement?（）

The statement produces an error at line 1.

The statement produces an error at line 3.

The statement produces an error at line 6.

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.

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.

参考答案和解析

正确答案： E

解析：暂无解析

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第1题：

Evaluate the SQL statement:SELECT ROUND(45.953, －1), TRUNC(45.936, 2)FROM dual;Which values are displayed? ()

A. 46 and 45

B. 46 and 45.93

C. 50 and 45.93

D. 50 and 45.9

E. 45 and 45.93

F. 45.95 and 45.93

参考答案：C

第2题：

Evaluate the SQL statement:SELECT LPAD (salary,10,*)FROM EMPWHERE EMP _ ID = 1001;If the employee with the EMP_ID 1001 has a salary of 17000, what is displayed?()

A. 17000.00

B. 17000*****

C. ****170.00

D. **17000.00

E. an error statement

参考答案：D

第3题：

The PRODUCTS table has these columns:PRODUCT_ID NUMBER(4)PRODUCT_NAME VARCHAR2(45)PRICE NUMBER(8,2)Evaluate this SQL statement:SELECT *FROM PRODUCTSORDER BY price, product _ name;What is true about the SQL statement? （）

A. The results are not sorted.

B. The results are sorted numerically.

C. The results are sorted alphabetically.

D. The results are sorted numerically and then alphabetically.

参考答案：D

第4题：

Evaluate this SQL statement:SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAMEFROM EMPLOYEES e, DEPARTMENTS dWHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID;In the statement, which capabilities of a SELECT statement are performed?（）

A.selection, projection, join

B.difference, projection, join

C.selection, intersection, join

D.intersection, projection, join

E.difference, projection, product

参考答案：A

第5题：

Evaluate the SQL statement:What will be displayed?()

A. 0

B. 1

C. 0.00

D. An error statement

参考答案：A

第6题：

Evaluate this SQL statement: SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME FROM EMP e, DEPARTMENT d WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID; In the statement, which capabilities of a SELECT statement are performed?（）

A. Selection, projection, join

B. Difference, projection, join

C. Selection, intersection, join

D. Intersection, projection, join

E. Difference, projection, product

参考答案：A

第7题：

Evaluate this SQL statement:In the statement, which capabilities of a SELECT statement are performed?()

A. Selection, projection, join

B. Difference, projection, join

C. Selection, intersection, join

D. Intersection, projection, join

E. Difference, projection, product

参考答案：A

第8题：

The user Sue issues this SQL statement:GRANT SELECT ON sue. EMP TO alice WITH GRANT OPTION; The user Alice issues this SQL statement:GRANT SELECT ON sue. EMP TO reena WITH GRANT OPTION; The user Reena issues this SQL statement:GRANT SELECT ON sue. EMP TO timber;The user Sue issues this SQL statement:REVOKE select on sue. EMP FROM alice;For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?（）

A. Alice only

B. Alice and Reena

C. Alice, Reena, and Timber

D. Sue, Alice, Reena, and Timber

参考答案：C

第9题：

Examine the structure of the EMPLOYEES and DEPARTMENTS tables:Evaluate this SQL statement:Which SQL statement is equivalent to the above SQL statement?()

参考答案：C

第10题：

Click the Exhibit button and examine the data from the ORDERS and CUSTOMERS tables.Evaluate the SQL statement:SELECT *FROM ordersWHERE cust_id = (SELECT cust_idFROM customersWHERE cust_name = ‘Smith‘);What is the result when the query is executed?（）

A.A

B.B

C.C

D.D

E.E

参考答案：A

Evaluate the SQL statement: 1 SELECT a.emp_name, a.sal, a.de

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