多选题Which three statements are true regarding subqueries?（）ASubqueries can contain GROUP BY and ORDER BY clausesBMain query and subquery can get data from different tablesCMain query and subquery must get data from the same tablesDSubqueries can contain OR

题目
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

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.Which two statements are true regarding the USING clause in table joins?（）A、It can be used to join a maximum of three tables B、It can be used to restrict the number of columns used in a NATURAL join C、It can be used to access data from tables through equijoins as well as nonequijoins D、It can be used to join tables that have columns with the same name and compatible data types

3.Which three statements are true about terms in a policy?（）A、The order of the terms in a policy is irrelevantB、The action is specified in a then statementC、Ters are optional in a policyD、The match condition can be identified with a from statementE、Every policy must contain at least one term

4.Which statements are true regarding the Query Result Cache? ()A. It can be set at the system, session, or table level.B. It is used only across statements in the same session.C. It can store the results from normal as well as flashback queries.D. It can store the results of queries based on normal, temporary, and dictionary tables.

更多“多选题Which three statements are true regarding subqueries?（）ASubqueries can contain GROUP BY and ORDER BY clausesBMain query and subquery can get data from different tablesCMain query and subquery must get data from the same tablesDSubqueries can contain OR”相关问题

  • 第1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2题：

    Which  statements are true regarding a tablespace（）

    • A、It can span multiple databases.
    • B、It can consist of multiple data files.
    • C、It can contain blocks of different sizes.
    • D、It can contain segments of different sizes.
    • E、It can contain a part of a nonpartitioned segment

    正确答案:B,D

  • 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：

    Which three statements about subqueries are true?（）

    • A、A single row subquery can retrieve only one column and one row.
    • B、A single row subquery can retrieve only one row but many columns.
    • C、A multiple row subquery can retrieve multiple rows and multiple columns.
    • D、A multiple row subquery can be compared by using the ">" operator.
    • E、A single row subquery can use the IN operator.
    • F、A multiple row subquery can use the "=" operator.

    正确答案:B,C,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 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6题：

    Which two statements are true regarding a tablespace（）

    • A、It can span multiple databases.
    • B、It can consist of multiple data files.
    • C、It can contain blocks of different sizes.
    • D、It can contain segments of different sizes.
    • E、It can contain a part of a nonpartitioned segment.

    正确答案:B,D

  • 第7题：

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

    A single row subquery can retrieve only one column and one row.

    B

    A single row subquery can retrieve only one row but many columns.

    C

    A multiple row subquery can retrieve multiple rows and multiple columns.

    D

    A multiple row subquery can be compared by using the “>” operator.

    E

    A single row subquery can use the IN operator.

    F

    A multiple row subquery can use the “=” operator.


    正确答案： A,D
    解析： 暂无解析

  • 第8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： E,B
    解析： 暂无解析

  • 第9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 a tablespace（）
    A

    It can span multiple databases.

    B

    It can consist of multiple data files.

    C

    It can contain blocks of different sizes.

    D

    It can contain segments of different sizes.

    E

    It can contain a part of a nonpartitioned segment.


    正确答案： E,C
    解析： 暂无解析

  • 第12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13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14题：

    Which statements are true regarding the Query Result Cache？（） 

    • A、 It can be set at the system， session， or table level.
    • B、 It is used only across statements in the same session.
    • C、 It can store the results from normal as well as flashback queries.
    • D、 It can store the results of queries based on normal，temporary，and dictionary tables.

    正确答案:A,C

  • 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：

    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17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18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19题：

    多选题
    Which two statements are true regarding the USING clause in table joins?（）
    A

    It can be used to join a maximum of three tables

    B

    It can be used to restrict the number of columns used in a NATURAL join

    C

    It can be used to access data from tables through equijoins as well as nonequijoins

    D

    It can be used to join tables that have columns with the same name and compatible data types


    正确答案： A,C
    解析： 暂无解析

  • 第20题：

    多选题
    Which three statements are true about terms in a policy?（）
    A

    The order of the terms in a policy is irrelevant

    B

    The action is specified in a then statement

    C

    Ters are optional in a policy

    D

    The match condition can be identified with a from statement

    E

    Every policy must contain at least one term


    正确答案： C,D
    解析： 暂无解析

  • 第21题：

    多选题
    Which  statements are true regarding a tablespace（）
    A

    It can span multiple databases.

    B

    It can consist of multiple data files.

    C

    It can contain blocks of different sizes.

    D

    It can contain segments of different sizes.

    E

    It can contain a part of a nonpartitioned segment


    正确答案： D,B
    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 statements are true regarding the Query Result Cache？（）
    A

    It can be set at the system， session， or table level.

    B

    It is used only across statements in the same session.

    C

    It can store the results from normal as well as flashback queries.

    D

    It can store the results of queries based on normal，temporary，and dictionary tables.


    正确答案： A,C
    解析： 暂无解析

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