单选题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

题目
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

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.Exhibit:Examine the data in the EMPLOYEES table.Examine the subquery:SELECT last_nameFROM employeesWHERE salary IN (SELECT MAX(salary)FROM employeesGROUP 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.

3.Top N analysis requires () and ().A. the use of rowidB. a GROUP BY clauseC. an ORDER BY clauseD. only an inline viewE. an inline view and an outer query

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“单选题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”相关问题

  • 第1题：

    Click the Exhibit button and examine the data in the EMPLOYEES table.Examine the subquery:SELECT last_nameFROM employeesWHERE salary IN (SELECT MAX(salary)FROM employeesGROUP 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.


    参考答案：A

  • 第2题：

    Which of the following abilities does a view NOT provide？（）

    • A、Change which columns show
    • B、Open a view from another database
    • C、Contain custom controls
    • D、Identify a column to act as a link

    正确答案:C

  • 第3题：

    Which two statements about subqueries are true? （）

    • A、A subquery should retrieve only one row.
    • B、A subquery can retrieve zero or more rows.
    • C、A subquery can be used only in SQL query statements.
    • D、Subqueries CANNOT be nested by more than two levels.
    • E、A subquery CANNOT be used in an SQL query statement that uses group functions.
    • F、When a subquery is used with an inequality comparison operator in the outer SQL statement, the column list in the SELECT clause of the subquery should contain only one column.

    正确答案:B,F

  • 第4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:B,D,E,F

  • 第5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:A,D

  • 第6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7题：

    Top N analysis requires （） and （）.

    • A、the use of rowid
    • B、a GROUP BY clause
    • C、an ORDER BY clause
    • D、only an inline view
    • E、an inline view and an outer query

    正确答案:C,E

  • 第8题：

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

    A main query can have more than one subquery.

    B

    A subquery can have more than one main query.

    C

    The subquery and main query must retrieve data from the same table.

    D

    The subquery and main query can retrieve data from different tables.

    E

    Only one column or expression can be compared between the subquery and main query.

    F

    Multiple columns or expression can be compared between the subquery and main query.


    正确答案： C,D
    解析： 暂无解析

  • 第9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10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： A,F
    解析： 暂无解析

  • 第11题：

    多选题
    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： D,B
    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：

    Which three statements are true regarding subqueries?（）

    • A、Subqueries can contain GROUP BY and ORDER BY clauses 
    • B、Main query and subquery can get data from different tables 
    • C、Main query and subquery must get data from the same tables 
    • D、Subqueries can contain ORDER BY but not the GROUP BY clause 
    • E、Only one column or expression can be compared between the main query and subquery
    • F、 Multiple columns or expressions can be compared between the main query and subquery

    正确答案:A,B,E

  • 第14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15题：

    Which three statements about subqueries are true? （）

    • A、A main query can have more than one subquery.
    • B、A subquery can have more than one main query.
    • C、The subquery and main query must retrieve data from the same table.
    • D、The subquery and main query can retrieve data from different tables.
    • E、Only one column or expression can be compared between the subquery and main query.
    • F、Multiple columns or expression can be compared between the subquery and main query.

    正确答案:A,C,E

  • 第16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17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18题：

    Which two statements about views are true?（）

    • A、A view can be created as read only.
    • B、A view can be created as a join on two or more tables.
    • C、A view cannot have an ORDER BY clause in the SELECT statement.
    • D、A view cannot be created with a GROUP BY clause in the SELECT statement.
    • E、A view must have aliases defined for the column names in the SELECT statement.

    正确答案:A,B

  • 第19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20题：

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

    A view can be created as read only.

    B

    A view can be created as a join on two or more tables.

    C

    A view cannot have an ORDER BY clause in the SELECT statement.

    D

    A view cannot be created with a GROUP BY clause in the SELECT statement.

    E

    A view must have aliases defined for the column names in the SELECT statement.


    正确答案： D,E
    解析： 暂无解析

  • 第21题：

    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.


    正确答案： D
    解析： 暂无解析

  • 第22题：

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

    A subquery should retrieve only one row.

    B

    A subquery can retrieve zero or more rows.

    C

    A subquery can be used only in SQL query statements.

    D

    Subqueries CANNOT be nested by more than two levels.

    E

    A subquery CANNOT be used in an SQL query statement that uses group functions.

    F

    When a subquery is used with an inequality comparison operator in the outer SQL statement, the column list in the SELECT clause of the subquery should contain only one column.


    正确答案： C,D
    解析： 暂无解析

  • 第23题：

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

    Subqueries can contain GROUP BY and ORDER BY clauses

    B

    Main query and subquery can get data from different tables

    C

    Main query and subquery must get data from the same tables

    D

    Subqueries can contain ORDER BY but not the GROUP BY clause

    E

    Only one column or expression can be compared between the main query and subquery

    F

    Multiple columns or expressions can be compared between the main query and subquery


    正确答案： B,D
    解析： 暂无解析

  • 第24题：

    多选题
    Top N analysis requires （） and （）.
    A

    the use of rowid

    B

    a GROUP BY clause

    C

    an ORDER BY clause

    D

    only an inline view

    E

    an inline view and an outer query


    正确答案： E,A
    解析： 暂无解析

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