单选题The PRODUCTS table has these columns: PRODUCT_ID NUMBER(4) PRODUCT_NAME VARCHAR2(45) PRICE NUMBER(8,2) Evaluate this SQL statement: SELECT * FROM PRODUCTS ORDER BY price, product _ name; What is true about the SQL statement? （）A The results are not sor

题目
单选题
The PRODUCTS table has these columns: PRODUCT_ID NUMBER(4) PRODUCT_NAME VARCHAR2(45) PRICE NUMBER(8,2) Evaluate this SQL statement: SELECT * FROM PRODUCTS ORDER 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.

相似考题

1.The EMPLOYEES table contains these columns:LAST_NAME VARCHAR2 (25)SALARY NUMBER (6,2)COMMISSION_PCT NUMBER (6)You need to write a query that will produce these results:1. Display the salary multiplied by the commission_pct.2. Exclude employees with a zero commission_pct.3. Display a zero for employees with a null commission value. Evaluate the SQL statement:SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEESWHERE COMMISSION_PCT IS NOT NULL;What does the statement provide? （）A. All of the desired resultsB. Two of the desired resultsC. One of the desired resultsD. An error statement

2.在SQLServer数据库（排序规则为默认值）中，有一个产品表products，你想按照价格从小到大的顺序显示所有产品的名称（productname）和价格（price），可以实现该功能的T-SQL语句是（）A、SELECT productname，price from products order by price ASCB、SELECT productname，price from products order by price DESCC、SELECT productname，price from products order by priceD、SELECT productname and price from products order by price DESC

3. Evaluate the CREATE TABLE statement：   CREATE TABLE products   （product_id NUMBER （6）  CONSTRAINT prod_id_pk PRIMARY KEY，  product_name VARCHAR2 （15））；   Which statement is true regarding the PROD_ID_PK constraint？（）A、 It would be created only if a unique index is manually created first.B、 It would be created and would use an automatically created unique index.C、 It would be created and would use an automatically created nonunique index.D、 It would be created and remains in a disabled state because no index is specified in the command.

4. The EMPLOYEES table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) COMMISSION_PCT NUMBER (6) You need to write a query that will produce these results: 1.Display the salary multiplied by the commission_pct. 2.Exclude employees with a zero commission_pct. 3.Display a zero for employees with a null commission value. Evaluate the SQL statement: SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEES WHERE COMMISSION_PCT IS NOT NULL; What does the statement provide?（）A、all of the desired resultsB、two of the desired resultsC、one of the desired resultsD、an error statement

参考答案和解析
正确答案： A
解析： 暂无解析
更多“单选题The PRODUCTS table has these columns: PRODUCT_ID NUMBER(4) PRODUCT_NAME VARCHAR2(45) PRICE NUMBER(8,2) Evaluate this SQL statement: SELECT * FROM PRODUCTS ORDER BY price, product _ name; What is true about the SQL statement? （）A The results are not sor”相关问题

  • 第1题：

    The EMPLOYEES table has these columns: LAST NAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE Management wants to add a default value to the SALARY column. You plan to alter the table by using this SQL statement: ALTER TABLE EMPLOYEES MODIFY ( SALARY DEFAULT 5000); What is true about your ALTER statement?（）

    • A、Column definitions cannot be altered to add DEFAULT values.
    • B、A change to the DEFAULT value affects only subsequent insertions to the table.
    • C、Column definitions cannot be altered at add DEFAULT values for columns with a NUMBER data type.
    • D、All the rows that have a NULL value for the SALARY column will be updated with the value 5000.

    正确答案:B

  • 第2题：

    The EMPLOYEES table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) COMMISSION_PCT NUMBER (6) You need to write a query that will produce these results: 1. Display the salary multiplied by the commission_pct. 2. Exclude employees with a zero commission_pct. 3. Display a zero for employees with a null commission value. Evaluate the SQL statement: SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEES WHERE COMMISSION_PCT IS NOT NULL; What does the statement provide? （）

    • A、All of the desired results
    • B、Two of the desired results
    • C、One of the desired results
    • D、An error statement

    正确答案:C

  • 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 PRODUCTS ORDER 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.

    正确答案:D

  • 第4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5题：

    单选题
    The EMP table contains these columns: EMPLOYEE_ID NUMBER(4) EMPNAME VARCHAR2 (25) SALARY NUMBER(9,2) HIRE_DATE DATE You query the database with this SQL statement: SELECT empname,hire_date HIREDATE, salary FROM EMP ORDER BY hire_date; How will the results be sorted?（）
    A

    randomly

    B

    ascending by date

    C

    descending by date

    D

    ascending alphabetically

    E

    descending alphabetically


    正确答案： A
    解析： 暂无解析

  • 第6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7题：

    单选题
    View the Exhibit and examine the structure of the ORDERS and ORDERJTEMS tables.  Evaluate the following SQL statement：   SELECT oi.order_id， product_jd， order_date   FROM order_items oi JOIN orders o   USING （order_id）；   Which statement is true regarding the execution of this SQL statement？（）
    A

     The statement would not execute because table aliases are not allowed in the JOIN clause.

    B

     The statement would not execute because the table alias prefix is not used in the USING clause.

    C

     The statement would not execute because all the columns in the SELECT clause are not prefixed with table aliases.

    D

     The statement would not execute because the column part of the USING clause cannot have a qualifier in the SELECT list.


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    The EMPLOYEES table has these columns: LAST_NAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE Management wants to add a default value to the SALARY column. You plan to alter the table by using this SQL statement: ALTER TABLE EMPLOYEES MODIFY (SALARY DEFAULT 5000); Which is true about your ALTER statement?（）
    A

    Column definitions cannot be altered to add DEFAULT values.

    B

    A change to the DEFAULT value affects only subsequent insertions to the table.

    C

    Column definitions cannot be altered to add DEFAULT values for columns with a NUMBER data type.

    D

    All the rows that have a NULL value for the SALARY column will be updated with the value 5000.


    正确答案： D
    解析： 暂无解析

  • 第9题：

    多选题
    Examine the SQL statement that creates ORDERS table: CREATE TABLE orders (SER_NO NUMBER UNIQUE, ORDER_ID NUMBER, ORDER_DATE DATE NOT NULL, STATUS VARCHAR2(10) CHECK (status IN ('CREDIT', 'CASH')), PROD_ID NUMBER REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER, PRIMARY KEY (order_id, order_date)); For which columns would an index be automatically created when you execute the above SQL statement? （）
    A

    SER_NO

    B

    ORDER_ID

    C

    STATUS

    D

    PROD_ID

    E

    ORD_TOTAL

    F

    composite index on ORDER_ID and ORDER_DATE


    正确答案： A,F
    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 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11题：

    单选题
    The EMPLOYEES table has these columns: LAST NAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE Management wants to add a default value to the SALARY column. You plan to alter the table by using this SQL statement: ALTER TABLE EMPLOYEES MODIFY ( SALARY DEFAULT 5000); What is true about your ALTER statement?（）
    A

    Column definitions cannot be altered to add DEFAULT values.

    B

    A change to the DEFAULT value affects only subsequent insertions to the table.

    C

    Column definitions cannot be altered at add DEFAULT values for columns with a NUMBER data type.

    D

    All the rows that have a NULL value for the SALARY column will be updated with the value 5000.


    正确答案： A
    解析： 暂无解析

  • 第12题：

    多选题
    Examine the SQL statement that creates ORDERS table: CREATE TABLE orders (SER_NO NUMBER UNIQUE, ORDER_ID NUMBER, ORDER_DATE DATE NOT NULL, STATUS VARCHAR2(10) CHECK (status IN ('CREDIT', 'CASH')), PROD_ID NUMBER REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER, PRIMARY KEY (order_id, order_date)); For which columns would an index be automatically created when you execute the above SQL statement? （）
    A

    SER_NO

    B

    ORDER_ID

    C

    STATUS

    D

    PROD_ID

    E

    ORD_TOTAL

    F

    composite index on ORDER_ID and ORDER_DATE


    正确答案： F,C
    解析： 暂无解析

  • 第13题：

    Examine the SQL statement that creates ORDERS table: CREATE TABLE orders (SER_NO NUMBER UNIQUE, ORDER_ID NUMBER, ORDER_DATE DATE NOT NULL, STATUS VARCHAR2(10) CHECK (status IN ('CREDIT', 'CASH')), PROD_ID NUMBER REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER, PRIMARY KEY (order_id, order_date)); For which columns would an index be automatically created when you execute the above SQL statement? （）

    • A、SER_NO
    • B、ORDER_ID
    • C、STATUS
    • D、PROD_ID
    • E、ORD_TOTAL
    • F、composite index on ORDER_ID and ORDER_DATE

    正确答案:A,F

  • 第14题：

    Examine the SQL statements that creates ORDERS table: CREATE TABLE orders (SER_NO NUMBER UNIQUE, ORDER_ID NUMBER, ORDER_DATE DATE NOT NULL STATUS VARCHARD2(10) CHECK (status IN ('CREDIT','CASH')), PROD_ID_NUMBER REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER, PRIMARY KEY (order id, order date)); For which columns would an index be automatically created when you execute the aboveSQL statement? （）

    • A、SER_NO
    • B、ORDER_ID
    • C、STATUS
    • D、PROD_ID
    • E、ORD_TOTAL
    • F、Composite index on ORDER_ID and ORDER_DATE

    正确答案:A,F

  • 第15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16题：

    Examine the SQL statement that creates ORDERS table: CREATE TABLE orders (SER_NO NUMBER UNIQUE, ORDER_ID NUMBER, ORDER_DATE DATE NOT NULL, STATUS VARCHAR2(10) CHECK (status IN ('CREDIT', 'CASH')), PROD_ID NUMBER REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER, PRIMARY KEY (order_id, order_date)); For which columns would an index be automatically created when you execute the above SQL statement? （）

    • A、SER_NO
    • B、ORDER_ID
    • C、STATUS
    • D、PROD_ID
    • E、ORD_TOTAL
    • F、composite index on ORDER_ID and ORDER_DATE

    正确答案:A,F

  • 第17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18题：

    单选题
    Evaluate the CREATE TABLE statement：   CREATE TABLE products   （product_id NUMBER （6）  CONSTRAINT prod_id_pk PRIMARY KEY，  product_name VARCHAR2 （15））；   Which statement is true regarding the PROD_ID_PK constraint？（）
    A

     It would be created only if a unique index is manually created first.

    B

     It would be created and would use an automatically created unique index.

    C

     It would be created and would use an automatically created nonunique index.

    D

     It would be created and remains in a disabled state because no index is specified in the command.


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    The EMPLOYEES table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) COMMISSION_PCT NUMBER (6) You need to write a query that will produce these results: 1. Display the salary multiplied by the commission_pct. 2. Exclude employees with a zero commission_pct. 3. Display a zero for employees with a null commission value. Evaluate the SQL statement: SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEES WHERE COMMISSION_PCT IS NOT NULL; What does the statement provide?（）
    A

    All of the desired results

    B

    Two of the desired results

    C

    One of the desired results

    D

    An error statement


    正确答案： D
    解析： 暂无解析

  • 第20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21题：

    单选题
    The EMPLOYEES table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) COMMISSION_PCT NUMBER (6) You need to write a query that will produce these results: 1. Display the salary multiplied by the commission_pct. 2. Exclude employees with a zero commission_pct. 3. Display a zero for employees with a null commission value. Evaluate the SQL statement: SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEES WHERE COMMISSION_PCT IS NOT NULL; What does the statement provide? （）
    A

    All of the desired results

    B

    Two of the desired results

    C

    One of the desired results

    D

    An error statement


    正确答案： D
    解析： 暂无解析

  • 第22题：

    多选题
    Examine the SQL statements that creates ORDERS table: CREATE TABLE orders (SER_NO NUMBER UNIQUE, ORDER_ID NUMBER, ORDER_DATE DATE NOT NULL STATUS VARCHARD2(10) CHECK (status IN ('CREDIT','CASH')), PROD_ID_NUMBER REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER, PRIMARY KEY (order id, order date)); For which columns would an index be automatically created when you execute the aboveSQL statement? （）
    A

    SER_NO

    B

    ORDER_ID

    C

    STATUS

    D

    PROD_ID

    E

    ORD_TOTAL

    F

    Composite index on ORDER_ID and ORDER_DATE


    正确答案： C,F
    解析： 暂无解析

  • 第23题：

    单选题
    The EMPLOYEES table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) COMMISSION_PCT NUMBER (6) You need to write a query that will produce these results: 1. Display the salary multiplied by the commission_pct. 2. Exclude employees with a zero commission_pct. 3. Display a zero for employees with a null commission value. Evaluate the SQL statement: SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEES WHERE COMMISSION_PCT IS NOT NULL; What does the statement provide? （）
    A

    All of the desired results

    B

    Two of the desired results

    C

    One of the desired results

    D

    An error statement


    正确答案： B
    解析： 暂无解析

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