多选题Which two statements are true about simple views？（）AViews can be created as read only.BViews are data segments like tables.CViews can be created on the basis of more than one table.DData manipulation language （DML） operations cannot be performed on vie

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

Views can be created as read only.

B

Views are data segments like tables.

C

Views can be created on the basis of more than one table.

D

Data manipulation language （DML） operations cannot be performed on views.

相似考题

1.Which two statements regarding a SQL profile are true?()A. It is built by Automatic Tuning Optimizer.B. It cannot be stored persistently in the data dictionary.C. It can be used by the query optimizer automatically.D. It can be created manually by using the CREATE PROFILE command.

2.Which two statements correctly describe the relation between a data file and the logical databasestructures（）A、An extent cannot spread across data files.B、A segment cannot spread across data files.C、A data file can belong to only one tablespace.D、A data file can have only one segment created in it.E、A data block can spread across multiple data files as it can consist of multiple operating system （OS） blocks.

3.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

4.Which two statements regarding the Flashback Table feature are correct?()A. Flashback Table can be performed on system tables.B. Flashback Table operation does not shrink the segments.C. Flashback Table uses log mining to extract SQL_REDO and SQL_UNDO statements.D. Flashback Table operation acquires exclusive data manipulation language (DML) locks.

更多“多选题Which two statements are true about simple views？（）AViews can be created as read only.BViews are data segments like tables.CViews can be created on the basis of more than one table.DData manipulation language （DML） operations cannot be performed on vie”相关问题

  • 第1题：

    ENCRYPT_TS is an encrypted tablespace that contains tables with data. Which statement is true regarding the effect of queries and data manipulation language (DML) statements on the encrypted data in the tables?（）

    • A、The data is decrypted during SORT and JOIN operations.
    • B、The data remains encrypted when it is read into memory.
    • C、The data remains encrypted when it is stored in the redo logs.
    • D、The data remains encrypted in the UNDO tablespace provided that the UNDO tablespace was created with the encryption option enabled.

    正确答案:C

  • 第2题：

    Which two statements regarding a SQL profile are true？（）

    • A、 It is built by Automatic Tuning Optimizer.
    • B、 It cannot be stored persistently in the data dictionary.
    • C、 It can be used by the query optimizer automatically.
    • D、 It can be created manually by using the CREATE PROFILE command.

    正确答案:A,C

  • 第3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4题：

    Which two statements are true about standard database auditing（）

    • A、DDL statements can be audited.
    • B、Statements that refer to stand-alone procedure can be audited.
    • C、Operations by the users logged on as SYSDBA cannot be audited.
    • D、Only one audit record is ever created for a session per audited statement even though it is executedmore than once.

    正确答案:A,B

  • 第5题：

    Which two are true regarding external tables？ （）

    • A、External tables can be updated. 
    • B、External tables are read-only tables. 
    • C、Indexes can be created on external tables. 
    • D、Indexes cannot be created on external tables.

    正确答案:B,D

  • 第6题：

    多选题
    Which  statements are correct about temporary tables（）
    A

    Indexes and views can be created on temporary tables.

    B

    Both the data and the structure of temporary tables can be exported.

    C

    Temporary tables are always created in a user’s temporary tablespace.

    D

    The data inserted into a temporary table in a session is available to other sessions.

    E

    Data manipulation language （DML） locks are never acquired on the data of temporary tables


    正确答案： D,E
    解析： 暂无解析

  • 第7题：

    多选题
    Which two statements are true about standard database auditing（）
    A

    DDL statements can be audited.

    B

    Statements that refer to stand-alone procedure can be audited.

    C

    Operations by the users logged on as SYSDBA cannot be audited.

    D

    Only one audit record is ever created for a session per audited statement even though it is executedmore than once.


    正确答案： A,D
    解析： 暂无解析

  • 第8题：

    多选题
    Which two statements are true regarding the MRKT tablespace（）
    A

    No more data files can be added to the tablespace.

    B

    Segment space is managed by free lists in the tablespace.

    C

    A user created without being assigned a default tablespace uses this tablespace.

    D

    The tablespace can be dropped with the current setting with segments present in it.


    正确答案： D,A
    解析： 暂无解析

  • 第9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10题：

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

    Constraint names must start with SYS_C

    B

    All constraints must be defines at the column level.

    C

    Constraints can be created after the table is created.

    D

    Constraints can be created at the same time the table is created.

    E

    Information about constraints is found in the VIEW_CONSTRAINTS dictionary view.


    正确答案： A,E
    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：

    多选题
    Which two statements correctly describe the relation between a data file and the logical database structures（）
    A

    An extent cannot spread across data files.

    B

    A segment cannot spread across data files.

    C

    A data file can belong to only one tablespace.

    D

    A data file can have only one segment created in it.

    E

    A data block can spread across multiple data files as it can consist of multiple operating system （OS）blocks


    正确答案： B,C
    解析： 暂无解析

  • 第13题：

    Which  statements are correct about temporary tables（）

    • A、Indexes and views can be created on temporary tables.
    • B、Both the data and the structure of temporary tables can be exported.
    • C、Temporary tables are always created in a user’s temporary tablespace.
    • D、The data inserted into a temporary table in a session is available to other sessions.
    • E、Data manipulation language （DML） locks are never acquired on the data of temporary tables

    正确答案:A,C,E

  • 第14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15题：

    Which two statements are true about simple views？（）

    • A、Views can be created as read only.
    • B、Views are data segments like tables.
    • C、Views can be created on the basis of more than one table.
    • D、Data manipulation language （DML） operations cannot be performed on views.

    正确答案:A,C

  • 第16题：

    Which three statements are correct about temporary tables？（）

    • A、Indexes and views can be created on temporary tables.
    • B、Both the data and the structure of temporary tables can be exported.
    • C、Temporary tables are always created in a user’s temporary tablespace.
    • D、The data inserted into a temporary table in a session is available to other sessions.
    • E、Data manipulation language （DML） locks are never acquired on the data of temporary tables.

    正确答案:A,C,E

  • 第17题：

    单选题
    ENCRYPT_TS is an encrypted tablespace that contains tables with data. Which statement is true regarding the effect of queries and data manipulation language （DML） statements on the encrypted data in the tables？（）
    A

     The data is decrypted during SORT and JOIN operations.

    B

     The data remains encrypted when it is read into memory.

    C

     The data remains encrypted when it is stored in the redo logs.

    D

     The data remains encrypted in the UNDO tablespace provided that the UNDO tablespace was created with the encryption option enabled.


    正确答案： B
    解析： 暂无解析

  • 第18题：

    多选题
    Which three statements are correct about temporary tables？（）
    A

    Indexes and views can be created on temporary tables.

    B

    Both the data and the structure of temporary tables can be exported.

    C

    Temporary tables are always created in a user’s temporary tablespace.

    D

    The data inserted into a temporary table in a session is available to other sessions.

    E

    Data manipulation language （DML） locks are never acquired on the data of temporary tables.


    正确答案： E,C
    解析： 暂无解析

  • 第19题：

    多选题
    Which two statements regarding the Flashback Table feature are correct?（）
    A

    Flashback Table can be performed on system tables.

    B

    Flashback Table operation does not shrink the segments.

    C

    Flashback Table uses log mining to extract SQL_REDO and SQL_UNDO statements.

    D

    Flashback Table operation acquires exclusive data manipulation language (DML) locks.


    正确答案： C,B
    解析： 暂无解析

  • 第20题：

    多选题
    Which two statements regarding a SQL profile are true？（）
    A

    It is built by Automatic Tuning Optimizer.

    B

    It cannot be stored persistently in the data dictionary.

    C

    It can be used by the query optimizer automatically.

    D

    It can be created manually by using the CREATE PROFILE command.


    正确答案： C,B
    解析： 暂无解析

  • 第21题：

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

    Constraint names must start with SYS_C

    B

    All constraints must be defines at the column level

    C

    Constraints can be created after the table is created

    D

    Constraints can be created at the same time the table is created

    E

    Information about constraints is found in the VIEW_CONSTRAINTS dictionary view


    正确答案： C,D
    解析： 暂无解析

  • 第22题：

    多选题
    Which two are true regarding external tables？ （）
    A

    External tables can be updated.

    B

    External tables are read-only tables.

    C

    Indexes can be created on external tables.

    D

    Indexes cannot be created on external tables.


    正确答案： B,A
    解析： 暂无解析

  • 第23题：

    多选题
    Which two statements are true about the duplexing of the backups taken by RMAN？（）
    A

    It’s only supported for the backups performed on the tape

    B

    It is not supported for backup operations that produce image copies

    C

    Duplex backups need a parallelism for the device to be equal to number of copies

    D

    Duplex backups can be performed to either disk or tape， but cannot be performed on tape and disk simultaneously


    正确答案： C,D
    解析： 暂无解析

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