多选题In which two cases would you use an outer join?（）AThe tables being joined have NOT NULL columns.BThe tables being joined have only matched data.CThe columns being joined have NULL values.DThe tables being joined have only unmatched data.EThe tables bei

题目
多选题
In which two cases would you use an outer join?（）
A

The tables being joined have NOT NULL columns.

B

The tables being joined have only matched data.

C

The columns being joined have NULL values.

D

The tables being joined have only unmatched data.

E

The tables being joined have both matched and unmatched data.

F

Only when the tables have a primary key/foreign key relationship.

相似考题

1.What is necessary for your query on an existing view to execute successfully? ()A. The underlying tables must have data.B. You need SELECT privileges on the view.C. The underlying tables must be in the same schema.D. You need SELECT privileges only on the underlying tables.

2.In which three cases would you use the USING clause?()A.You want to create a nonequijoin.B.The tables to be joined have multiple NULL columns.C.The tables to be joined have columns of the same name and different data types.D.The tables to be joined have columns with the same name and compatible data types.E.You want to use a NATURAL join, but you want to restrict the number of columns in the join condition.

3.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

4.Which four actions are possible during an Online Data file Move operation?()A. Creating and dropping tables in the data file being movedB. Performing file shrink of the data file being movedC. Querying tables in the data file being movedD. Performing Block Media Recovery for a data block in the data file being movedE. Flashing back the databaseF. Executing DML statements on objects stored in the data file being moved

更多“多选题In which two cases would you use an outer join?（）AThe tables being joined have NOT NULL columns.BThe tables being joined have only matched data.CThe columns being joined have NULL values.DThe tables being joined have only unmatched data.EThe tables bei”相关问题

  • 第1题：

    Which four actions are possible during an Online Data file Move operation?（）

    • A、Creating and dropping tables in the data file being moved
    • B、Performing file shrink of the data file being moved
    • C、Querying tables in the data file being moved
    • D、Performing Block Media Recovery for a data block in the data file being moved
    • E、Flashing back the database
    • F、Executing DML statements on objects stored in the data file being moved

    正确答案:A,C,D,F

  • 第2题：

    The rows inside three Oracle tables supporting a customer order entry system are frequently accessed together by means of a table join. Because data is always being added to the tables, you leave a lot of extra space inside each block to accommodate growth. Which of the following types of tables would be useful for storing the data in this context?（）

    • A、Temporary tables 
    • B、Index-organized tables 
    • C、Cluster tables 
    • D、Standard Oracle tables 

    正确答案:D

  • 第3题：

    What is necessary for your query on an existing view to execute successfully? （）

    • A、The underlying tables must have data.
    • B、You need SELECT privileges on the view.
    • C、The underlying tables must be in the same schema.
    • D、You need SELECT privileges only on the underlying tables.

    正确答案:B

  • 第4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5题：

    What two statements are true regarding the recommendations received from the SQL Access Advisor？（）

    • A、 It cannot generate recommendations that support multiple workload queries.
    • B、 It can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.
    • C、 It can recommend partitioning only on tables that have at least 10，000 rows.
    • D、 It can recommend only B-tree indexes and not bitmap or function-based indexes.

    正确答案:B,C

  • 第6题：

    You create a Web Form that displays a GridView. The GridViews data source is a DataSet named dsOrders. The DataSet contains two DataTables named Orders and OrderDetails. You create a relation between the two DataTables using the following code segment. (Line numbers are included for reference only.)01 dtOrders = dsOrders.Tables[“Orders”]; 02 dtOrderDetails = dsOrders.Tables[“OrderDetail”]; 03 colParent = dtOrders.Columns[“OrderID”]; 04 colChild = dtOrderDetails.Columns[“ParentOrderID”]; 05 dsOrders.Relations.Add(“Rell”, colParent, colChild, false); You need to find the cause of the exception being raised in line 05. What should you do? （）

    • A、Ensure that the child column and the parent column have the same names.
    • B、Ensure that the child table and the parent table have the same names.
    • C、Ensure that the child column and the parent column have the same data types.
    • D、Ensure that each row in the child table has a corresponding row in the parent table.
    • E、Ensure that the tables have an explicit relationship defined by a foreign key constraint in the database.

    正确答案:C

  • 第7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8题：

    单选题
    In which case would you use a FULL OUTER JOIN?（）
    A

    Both tables have NULL values.

    B

    You want all unmatched data from one table.

    C

    You want all matched data from both tables.

    D

    You want all unmatched data from both tables.

    E

    One of the tables has more data than the other.

    F

    You want all matched and unmatched data from only one table.


    正确答案： D
    解析： 暂无解析

  • 第9题：

    多选题
    Which four actions are possible during an Online Data file Move operation?（）
    A

    Creating and dropping tables in the data file being moved

    B

    Performing file shrink of the data file being moved

    C

    Querying tables in the data file being moved

    D

    Performing Block Media Recovery for a data block in the data file being moved

    E

    Flashing back the database

    F

    Executing DML statements on objects stored in the data file being moved


    正确答案： F,A
    解析： 暂无解析

  • 第10题：

    多选题
    What are two reasons to create synonyms? （）
    A

    You have too many tables.

    B

    Your tables are too long.

    C

    Your tables have difficult names.

    D

    You want to work on your own tables.

    E

    You want to use another schema's tables.

    F

    You have too many columns in your tables.


    正确答案： D,A
    解析： 暂无解析

  • 第11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12题：

    In which case would you use a FULL OUTER JOIN?（）

    • A、Both tables have NULL values.
    • B、You want all unmatched data from one table.
    • C、You want all matched data from both tables.
    • D、You want all unmatched data from both tables.
    • E、One of the tables has more data than the other.
    • F、You want all matched and unmatched data from only one table.

    正确答案:D

  • 第13题：

    What two statements are true regarding the recommendations received from the SQL Access Advisor?（）(Choose two.)

    • A、It cannot generate recommendations that support multiple workload queries.
    • B、It can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.
    • C、It can recommend partitioning only on tables that have at least 10,000 rows.
    • D、It can recommend only B-tree indexes and not bitmap or function-based indexes

    正确答案:B,C

  • 第14题：

    What are two reasons to create synonyms? （）

    • A、You have too many tables.
    • B、Your tables are too long.
    • C、Your tables have difficult names.
    • D、You want to work on your own tables.
    • E、You want to use another schema's tables.
    • F、You have too many columns in your tables.

    正确答案:C,E

  • 第15题：

    Which two statements are true regarding the USING and ON clauses in table joins?（）

    • A、Both USING and ON clauses can be used for equijoins and nonequijoins 
    • B、Amaximum of one pair of columns can be joined between two tables using the ON clause 
    • C、The ON clause can be used to join tables on columns that have different names but compatible data types 
    • D、The WHERE clause can be used to apply additional conditions in SELECT statements containing the ON or the USING clause 

    正确答案:C,D

  • 第16题：

    In which two cases would you use an outer join? （）

    • A、The tables being joined have NOT NULL columns.
    • B、The tables being joined have only matched data.
    • C、The columns being joined have NULL values.
    • D、The tables being joined have only unmatched data.
    • E、The tables being joined have both matched and unmatched data.
    • F、Only when the tables have a primary key/foreign key relationship.

    正确答案:C,E

  • 第17题：

    多选题
    What two statements are true regarding the recommendations received from the SQL Access Advisor?（）(Choose two.)
    A

    It cannot generate recommendations that support multiple workload queries.

    B

    It can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.

    C

    It can recommend partitioning only on tables that have at least 10,000 rows.

    D

    It can recommend only B-tree indexes and not bitmap or function-based indexes


    正确答案： D,C
    解析： 暂无解析

  • 第18题：

    多选题
    What two statements are true regarding the recommendations received from the SQL Access Advisor？（）
    A

    It cannot generate recommendations that support multiple workload queries.

    B

    It can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.

    C

    It can recommend partitioning only on tables that have at least 10，000 rows.

    D

    It can recommend only B-tree indexes and not bitmap or function-based indexes.


    正确答案： A,D
    解析： 暂无解析

  • 第19题：

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

    Both USING and ON clauses can be used for equijoins and nonequijoins

    B

    Amaximum of one pair of columns can be joined between two tables using the ON clause

    C

    The ON clause can be used to join tables on columns that have different names but compatible data types

    D

    The WHERE clause can be used to apply additional conditions in SELECT statements containing the ON or the USING clause


    正确答案： A,C
    解析： 暂无解析

  • 第20题：

    多选题
    In which three cases would you use the USING clause?（）
    A

    You want to create a nonequijoin.

    B

    The tables to be joined have multiple NULL columns.

    C

    The tables to be joined have columns of the same name and different data types.

    D

    The tables to be joined have columns with the same name and compatible data types.

    E

    You want to use a NATURAL join, but you want to restrict the number of columns in the join condition.


    正确答案： C,B
    解析： 暂无解析

  • 第21题：

    多选题
    In which two cases would you use an outer join? （）
    A

    The tables being joined have NOT NULL columns.

    B

    The tables being joined have only matched data.

    C

    The columns being joined have NULL values.

    D

    The tables being joined have only unmatched data.

    E

    The tables being joined have both matched and unmatched data.

    F

    Only when the tables have a primary key-foreign key relationship.


    正确答案： D,C
    解析： 暂无解析

  • 第22题：

    单选题
    What is necessary for your query on an existing view to execute successfully?（）
    A

    The underlying tables must have data.

    B

    You need SELECT privileges on the view.

    C

    The underlying tables must be in the same schema.

    D

    You need SELECT privileges only on the underlying tables.


    正确答案： C
    解析： 暂无解析

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