单选题You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=".What happens when the main query is executed?（）A The main query executes with the first value returned by the subquery.B The main query executes with

题目
单选题
You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=".What happens when the main query is executed?（）
A

The main query executes with the first value returned by the subquery.

B

The main query executes with the last value returned by the subquery.

C

The main query executes with all the values returned by the subquery.

D

The main query fails because the multiple-row subquery cannot be used with the comparison operator.

E

You cannot define a multiple-row subquery in the WHERE clause of a SQL query.

相似考题

1.Which best describes an inline view? ()A. a schema objectB. a subquery that can contain an ORDER BY clauseC. another name for a view that contains group functionsD. a subquery that is part of the FROM clause of another query

2.You define a multiple－row subquery in the WHERE clause of an SQL query with a comparison operator "=". What happens when the main query is executed? ()A. The main query executes with the first value returned by the subquery.B. The main query executes with the last value returned by the subquery.C. The main query executes with all the values returned by the subquery.D. The main query fails because the multiple-row subquery cannot be used with the comparison operator.E. You cannot define a multiple-row subquery in the WHERE clause of a SQL query.

3.In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement? ()A. Immediately after the SELECT clauseB. Before the WHERE clauseC. Before the FROM clauseD. After the ORDER BY clauseE. After the WHERE clause

4.In which four clauses can a subquery be used? ()A. in the INTO clause of an INSERT statementB. in the FROM clause of a SELECT statementC. in the GROUP BY clause of a SELECT statementD. in the WHERE clause of a SELECT statementE. in the SET clause of an UPDATE statementF. in the VALUES clause of an INSERT statement

更多“You define a multiple-row subquery in the WHERE clause of an”相关问题

  • 第1题：

    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.


    参考答案：C

  • 第2题：

    Which two statements about subqueries are true? （）

    • A、A single row subquery can retrieve data from only one table.
    • B、A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
    • C、A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.
    • D、A single row subquery can retrieve data from more than one table.
    • E、A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
    • F、A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.

    正确答案:B,D

  • 第3题：

    Which best describes an inline view? （）

    • A、a schema object
    • B、a subquery that can contain an ORDER BY clause
    • C、another name for a view that contains group functions
    • D、a subquery that is part of the FROM clause of another query

    正确答案:D

  • 第4题：

    Which two statements are true about WHERE and HAVING clauses? （）

    • A、A WHERE clause can be used to restrict both rows and groups.
    • B、A WHERE clause can be used to restrict rows only.
    • C、A HAVING clause can be used to restrict both rows and groups.
    • D、A HAVING clause can be used to restrict groups only.
    • E、A WHERE clause CANNOT be used in a query if the query uses a HAVING clause.
    • F、A HAVING clause CANNOT be used in subqueries.

    正确答案:B,D

  • 第5题：

    Which two statements about subqueries are true? （）

    • A、A single row subquery can retrieve data from only one table.
    • B、A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
    • C、A SQL query statement can display data from table B that is referred to in its subquery, without including B in its own FROM clause.
    • D、A single row subquery can retrieve data from more than one table.
    • E、A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
    • F、A multiple-row subquery cannot be used in an INSERT statement to insert multiple rows at a time.

    正确答案:D,F

  • 第6题：

    You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=".What happens when the main query is executed?（）

    • A、The main query executes with the first value returned by the subquery.
    • B、The main query executes with the last value returned by the subquery.
    • C、The main query executes with all the values returned by the subquery.
    • D、The main query fails because the multiple-row subquery cannot be used with the comparison operator.
    • E、You cannot define a multiple-row subquery in the WHERE clause of a SQL query.

    正确答案:D

  • 第7题：

    单选题
    Which operator can be used with a multiple-row subquery?（）
    A

    =

    B

    LIKE

    C

    BETWEEN

    D

    NOT IN

    E

    IS

    F

    <>


    正确答案： B
    解析： 暂无解析

  • 第8题：

    多选题
    In which four clauses can a subquery be used? （）
    A

    in the INTO clause of an INSERT statement

    B

    in the FROM clause of a SELECT statement

    C

    in the GROUP BY clause of a SELECT statement

    D

    in the WHERE clause of a SELECT statement

    E

    in the SET clause of an UPDATE statement

    F

    in the VALUES clause of an INSERT statement


    正确答案： C,D
    解析： 暂无解析

  • 第9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10题：

    单选题
    Which best describes an inline view? （）
    A

    a schema object

    B

    a subquery that can contain an ORDER BY clause

    C

    another name for a view that contains group functions

    D

    a subquery that is part of the FROM clause of another query


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement? （）
    A

    Immediately after the SELECT clause

    B

    Before the WHERE clause

    C

    Before the FROM clause

    D

    After the ORDER BY clause

    E

    After the WHERE clause


    正确答案： E
    解析： 暂无解析

  • 第12题：

    单选题
    Exhibit: Examine the data in the EMPLOYEES table. Examine the subquery: SELECT last_name FROM employees WHERE salary IN (SELECT MAX(salary) FROM employees GROUP BY department_id); Which statement is true?（）
    A

    The SELECT statement is syntactically accurate.

    B

    The SELECT statement does not work because there is no HAVING clause.

    C

    The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.

    D

    The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.


    正确答案： C
    解析： 暂无解析

  • 第13题：

    In which four clauses can a subquery be used?（）

    • A、in the INTO clause of an INSERT statement
    • B、in the FROM clause of a SELECT statement
    • C、in the GROUP BY clause of a SELECT statement
    • D、in the WHERE clause of a SELECT statement
    • E、in the SET clause of an UPDATE statement
    • F、in the VALUES clause of an INSERT statement

    正确答案:A,B,D,E

  • 第14题：

    The accounts receivable department requested an accounts status to allow users to enter either a customer name, customer number, customer phone number and then display the customer out standing balance. You want to restrict the data retrieved based on values entered by the users. Which where clause would you write in the query to select statement to accomplish this task?（）

    • A、&p_where_clause 
    • B、:p_where_clause 
    • C、WHERE CUST_ID=P_CUST_ID or cust_name=:p_cust_name or cust_phone=:p_cust_phone 
    • D、Where cust_ID=&p_custid cust_name=&p_cust_name or cust_phone=&p_cust_phone

    正确答案:A

  • 第15题：

    Which two statements are true regarding views?（）

    • A、A subquery that defines a view cannot include the GROUP BY clause 
    • B、A view that is created with the subquery having the DISTINCT keyword can be updated 
    • C、A view that is created with the subquery having the pseudo column ROWNUM keyword cannot be updated 
    • D、A data manipulation language (DML) operation can be performed on a view that is created with the subquery having all the NOT NULL columns of a table

    正确答案:C,D

  • 第16题：

    Where can subqueries be used?（）

    • A、field names in the SELECT statement 
    • B、the FROM clause in the SELECT statement 
    • C、the HAVING clause in the SELECT statement
    • D、the GROUP BY clause in the SELECT statement 
    • E、the WHERE clause in only the SELECT statement 
    • F、the WHERE clause in SELECT as well as all DML statements

    正确答案:B,C,F

  • 第17题：

    In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement?（）

    • A、Immediately after the SELECT clause
    • B、Before the WHERE clause
    • C、Before the FROM clause
    • D、After the ORDER BY clause
    • E、After the WHERE clause

    正确答案:E

  • 第18题：

    多选题
    Where can subqueries be used?（）
    A

    field names in the SELECT statement

    B

    the FROM clause in the SELECT statement

    C

    the HAVING clause in the SELECT statement

    D

    the GROUP BY clause in the SELECT statement

    E

    the WHERE clause in only the SELECT statement

    F

    the WHERE clause in SELECT as well as all DML statements


    正确答案： C,E
    解析： 暂无解析

  • 第19题：

    多选题
    Which two statements about subqueries are true? （）
    A

    A single row subquery can retrieve data from only one table.

    B

    A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.

    C

    A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.

    D

    A single row subquery can retrieve data from more than one table.

    E

    A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.

    F

    A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.


    正确答案： F,E
    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 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21题：

    多选题
    Which two statements are true regarding subqueries? （）
    A

    A subquery can retrieve zero or more rows

    B

    Only two subqueries can be placed atone level

    C

    A subquery can be used only in SQL query statements

    D

    A subquery can appear on either side of a comparison operator

    E

    There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement


    正确答案： C,D
    解析： 暂无解析

  • 第22题：

    多选题
    Which two statements about subqueries are true? （）
    A

    A single row subquery can retrieve data from only one table.

    B

    A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.

    C

    A SQL query statement can display data from table B that is referred to in its subquery, without including B in its own FROM clause.

    D

    A single row subquery can retrieve data from more than one table.

    E

    A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.

    F

    A multiple-row subquery cannot be used in an INSERT statement to insert multiple rows at a time.


    正确答案： E,D
    解析： 暂无解析

  • 第23题：

    多选题
    Which two statements are true about WHERE and HAVING clauses? （）
    A

    A WHERE clause can be used to restrict both rows and groups.

    B

    A WHERE clause can be used to restrict rows only.

    C

    A HAVING clause can be used to restrict both rows and groups.

    D

    A HAVING clause can be used to restrict groups only.

    E

    A WHERE clause CANNOT be used in a query of the query uses a HAVING clause.

    F

    A HAVING clause CANNOT be used in subqueries.


    正确答案： E,B
    解析： 暂无解析

相关内容