单选题You need to display the last names of those employees who have the letter "A" as the second character in their names. Which SQL statement displays the required results? （）A SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';B SELECT last_name FROM E

题目
单选题
You need to display the last names of those employees who have the letter "A" as the second character in their names. Which SQL statement displays the required results? （）
A

SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';

B

SELECT last_name FROM EMP WHERE last name ='*A%'

C

SELECT last_name FROM EMP WHERE last name ='_A%';

D

SELECT last_name FROM EMP WHERE last name LIKE '*A%'

相似考题

1.The EMP table has these columns:ENAME VARCHAR2(35)SALARY NUMBER(8,2)HIRE_DATE DATEManagement wants a list of names of employees who have been with the company for more than five years. Which SQL statement displays the required results? （）A. SELECT ENAME FROM EMP WHERE SYSDATE-HIRE_DATE >5;B. SELECT ENAME FROM EMP WHERE HIRE_DATE-SYSDATE >5;C. SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)/365 >5;D. SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)*/365 >5;

2.The EMP table contains these columns:You need to display the employees who have not been assigned to any department.You write the SELECT statement:What is true about this SQL statement?()A. The SQL statement displays the desired results.B. The column in the WHERE clause should be changed to display the desired results.C. The operator in the WHERE clause should be changed to display the desired results.D. The WHERE clause should be changed to use an outer join to display the desired results.

3.You need to display the last names of those employees who have the letter "A" as the second character in their names.Which SQL statement displays the required results?（）A、SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';B、SELECT last_name FROM EMP WHERE last name ='*A%'C、SELECT last_name FROM EMP WHERE last name ='_A%';D、SELECT last_name FROM EMP WHERE last name LIKE '*A%'

4.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;

更多“单选题You need to display the last names of those employees who have the letter "A" as the second character in their names. Which SQL statement displays the required results? （）A SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';B SELECT last_name FROM E”相关问题

  • 第1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;

    正确答案:D

  • 第2题：

    Management has asked you to calculate the value 12*salary* commission_pct for all the employees in the EMP table. The EMP table contains these columns: LAST NAME VARCNAR2(35) NOT NULL SALARY NUMBER(9,2) NOT NULL COMMISION_PCT NUMBER(4,2) Which statement ensures that a value is displayed in the calculated columns for all employees?（）

    • A、SELECT last_name, 12*salary* commission_pct FROM emp;
    • B、SELECT last_name, 12*salary* (commission_pct,0) FROM emp;
    • C、SELECT last_name, 12*salary*(nvl(commission_pct,0)) FROM emp;
    • D、SELECT last_name, 12*salary*(decode(commission_pct,0)) FROM emp;

    正确答案:C

  • 第3题：

    Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith?（）

    • A、SELECT COUNT(*) FROM employees WHERE last_name='Smith';
    • B、SELECT COUNT(dept_id) FROM employees WHERE last_name='Smith';
    • C、SELECT DISTINCT(COUNT(dept_id)) FROM employees WHERE last_name='Smith';
    • D、SELECT COUNT(DISTINCT dept_id) FROM employees WHERE last_name='Smith';
    • E、SELECT UNIQUE(dept_id) FROM employees WHERE last_name='Smith';

    正确答案:D

  • 第4题：

    Which SQL statement accepts user input for the columns to be displayed, the table name, and WHERE condition? （）

    • A、SELECT &1, "&2" FROM &3 WHERE last_name = '&8';
    • B、SELECT &1, '&2' FROM &3 WHERE '& last_name = '&8';
    • C、SELECT &1, &2 FROM &3 WHERE last_name = '&8';
    • D、SELECT &1, '&2' FROM EMP WHERE last_name = '&8';

    正确答案:C

  • 第5题：

    The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement? （）

    • A、The SQL statement displays the desired results.
    • B、The column in the WHERE clause should be changed to display the desired results.
    • C、The operator in the WHERE clause should be changed to display the desired results.
    • D、The WHERE clause should be changed to use an outer join to display the desired results.

    正确答案:C

  • 第6题：

    You need to display the last names of those employees who have the letter “A” as the second character in their names.Which SQL statement displays the required results?（）

    • A、SELECT last_name   FROM EMP   WHERE last_name LIKE ‘_A%’;
    • B、SELECT last_name   FROM EMP   WHERE last name =’*A%’
    • C、SELECT last_name   FROM EMP   WHERE last name =’_A%’;
    • D、SELECT last_name   FROM EMP   WHERE last name LIKE ‘*A%’

    正确答案:A

  • 第7题：

    单选题
    The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement?（）
    A

    The SQL statement displays the desired results.

    B

    The column in the WHERE clause should be changed to display the desired results.

    C

    The operator in the WHERE clause should be changed to display the desired results.

    D

    The WHERE clause should be changed to use an outer join to display the desired results.


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    You need to display the last names of those employees who have the letter “A” as the second character in their names.Which SQL statement displays the required results?（）
    A

    SELECT last_name   FROM EMP   WHERE last_name LIKE ‘_A%’;

    B

    SELECT last_name   FROM EMP   WHERE last name =’*A%’

    C

    SELECT last_name   FROM EMP   WHERE last name =’_A%’;

    D

    SELECT last_name   FROM EMP   WHERE last name LIKE ‘*A%’


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them?（）
    A

    The two statements produce identical results.

    B

    The second statement returns a syntax error.

    C

    There is no need to specify DESC because the results are sorted in descending order by default.

    D

    The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    The EMP table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) DEPARTMENT_ID NUMBER (6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARTMENT_ID = NULL; What is true about this SQL statement ?（）
    A

    The SQL statement displays the desired results.

    B

    The column in the WHERE clause should be changed to display the desired results.

    C

    The operator in the WHERE clause should be changed to display the desired results.

    D

    The WHERE clause should be changed to use an outer join to display the desired results.


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    You need to display the last names of those employees who have the letter "A" as the second character in their names.Which SQL statement displays the required results?（）
    A

    SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';

    B

    SELECT last_name FROM EMP WHERE last name ='*A%'

    C

    SELECT last_name FROM EMP WHERE last name ='_A%';

    D

    SELECT last_name FROM EMP WHERE last name LIKE '*A%'


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement? （）
    A

    The SQL statement displays the desired results.

    B

    The column in the WHERE clause should be changed to display the desired results.

    C

    The operator in the WHERE clause should be changed to display the desired results.

    D

    The WHERE clause should be changed to use an outer join to display the desired results.


    正确答案： C
    解析： 暂无解析

  • 第13题：

    Click the Exhibit button and examine the data in the EMPLOYEES and DEPARTMENTS tables.You want to retrieve all employees, whether or not they have matching departments in the departments table. Which query would you use?（）

    • A、SELECT last_name, department_name FROM employees NATURAL JOIN departments;
    • B、SELECT last_name, department_name FROM employees JOIN departments ;
    • C、SELECT last_name, department_name FROM employees e JOIN departments d ON (e.department_id = d.department_id);
    • D、SELECT last_name, department_name FROM employees e RIGHT OUTER JOIN departments d ON (e.department_id = d.department_id);
    • E、SELECT last_name, department_name FROM employees FULL JOIN departments ON (e.department_id = d.department_id);
    • F、SELECT last_name, department_name FROM employees e LEFT OUTER JOIN departments d ON (e.department_id = d.department_id);

    正确答案:F

  • 第14题：

    The EMPLOYEES table contains these columns: EMPLOYEE_ID NUMBER(4) LAST_NAME VARCHAR2 (25) JOB_ID VARCHAR2(10) You want to search for strings that contain 'SA_' in the JOB_ID column. Which SQL statement do you use?（）

    • A、SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA/_%' ESCAPE '/';
    • B、SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA_';
    • C、SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA_' ESCAPE "/";
    • D、SELECT employee_id, last_name, job_id FROM employees WHERE job_id = '%SA_';

    正确答案:A

  • 第15题：

    You need to display the last names of those employees who have the letter "A" as the second character in their names. Which SQL statement displays the required results? （）

    • A、SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';
    • B、SELECT last_name FROM EMP WHERE last name ='*A%'
    • C、SELECT last_name FROM EMP WHERE last name ='_A%';
    • D、SELECT last_name FROM EMP WHERE last name LIKE '*A%'

    正确答案:A

  • 第16题：

    The EMP table has these columns: ENAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE Management wants a list of names of employees who have been with the company for more than five years. Which SQL statement displays the required results? （）

    • A、SELECT ENAME FROM EMP WHERE SYSDATE-HIRE_DATE >5;
    • B、SELECT ENAME FROM EMP WHERE HIRE_DATE-SYSDATE >5;
    • C、SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)/365 >5;
    • D、SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)*/365 >5;

    正确答案:C

  • 第17题：

    The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement?（）

    • A、The SQL statement displays the desired results.
    • B、The column in the WHERE clause should be changed to display the desired results.
    • C、The operator in the WHERE clause should be changed to display the desired results.
    • D、The WHERE clause should be changed to use an outer join to display the desired results.

    正确答案:C

  • 第18题：

    The EMP table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) DEPARTMENT_ID NUMBER (6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARTMENT_ID = NULL; What is true about this SQL statement ?（）

    • A、The SQL statement displays the desired results.
    • B、The column in the WHERE clause should be changed to display the desired results.
    • C、The operator in the WHERE clause should be changed to display the desired results.
    • D、The WHERE clause should be changed to use an outer join to display the desired results.

    正确答案:C

  • 第19题：

    单选题
    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;


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith?（）
    A

    SELECT COUNT(*) FROM employees WHERE last_name='Smith';

    B

    SELECT COUNT(dept_id) FROM employees WHERE last_name='Smith';

    C

    SELECT DISTINCT(COUNT(dept_id)) FROM employees WHERE last_name='Smith';

    D

    SELECT COUNT(DISTINCT dept_id) FROM employees WHERE last_name='Smith';

    E

    SELECT UNIQUE(dept_id) FROM employees WHERE last_name='Smith';


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement? （）
    A

    The SQL statement displays the desired results.

    B

    The column in the WHERE clause should be changed to display the desired results.

    C

    The operator in the WHERE clause should be changed to display the desired results.

    D

    The WHERE clause should be changed to use an outer join to display the desired results.


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    The EMP table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) DEPARTMENT_ID NUMBER (6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARTMENT_ID = NULL; What is true about this SQL statement ?（）
    A

    The SQL statement displays the desired results.

    B

    The column in the WHERE clause should be changed to display the desired results.

    C

    The operator in the WHERE clause should be changed to display the desired results.

    D

    The WHERE clause should be changed to use an outer join to display the desired results.


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    You need to display the last names of those employees who have the letter "A" as the second character in their names. Which SQL statement displays the required results? （）
    A

    SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';

    B

    SELECT last_name FROM EMP WHERE last name ='*A%'

    C

    SELECT last_name FROM EMP WHERE last name ='_A%';

    D

    SELECT last_name FROM EMP WHERE last name LIKE '*A%'


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    Which SQL statement accepts user input for the columns to be displayed, the table name, and WHERE condition? （）
    A

    SELECT &1, &2 FROM &3 WHERE last_name = '&8';

    B

    SELECT &1, '&2' FROM &3 WHERE '& last_name = '&8';

    C

    SELECT &1, &2 FROM &3 WHERE last_name = '&8';

    D

    SELECT &1, '&2' FROM EMP WHERE last_name = '&8';


    正确答案： A
    解析： 暂无解析

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