单选题The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. Wh

题目
单选题
The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? SELECT * FROM HR;（）
A

You obtain the results retrieved from the public synonym HR created by the database administrator.

B

You obtain the results retrieved from the HR table that belongs to your schema.

C

You get an error message because you cannot retrieve from a table that has the same name as a public synonym.

D

You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product.

E

You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.

相似考题

1. You discover that the schema changes that were recently made to your SQL Server 2005 database have caused your Web site to stop functioning. It is unclear who made the changes. TestKing.com now mandates that all changes to the database schema be tracked. You need to implement a mechanism that will track schema changes in your database.  What should you do？（）A、Implement a stored procedure that writes data about schema changes to a log table.B、Implement DDL AFTER triggers that write user and schema information to a log table.C、Implement a DML INSTEAD OF trigger that writes data about schema changes to a log table.D、Implement a DML AFTER trigger that writes data about schema changes to a log table.

2.On Monday， you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday， you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct？（）A、 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.B、 You can restore the DEPT table by using the Oracle Flashback Drop feature， provided you use the RENAME TO clause.C、 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.D、 You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.

3. On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by issuing the following command: $> sqlldr hr/hr@pdb table=employees Which two statements are true regarding the command?（）A、It succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.B、It fails because no SQL *Loader data file location is specified.C、It fails if the HR user does not have the CREATE ANY DIRECTORY privilege.D、It fails because no SQL *Loader control file location is specified.

4. In your test database， you have created the ORDERS table as an index/x7forganized table （IOT）. To facilitate faster querying， you have created a mapping table and a bitmap index on the ORDER_FILLED column. You observe that the query performance degrades when users perform a large volume of transactions.  While investigating the reason， you find that the mapping table segment is fragmented， leading to poor performance. Which option would you use to defragment the mapping table without affecting the original table data？（）A、export and import the mapping tableB、drop and re­create the mapping tableC、truncate the mapping table and reinsert the valuesD、use the ALTER TABLE .. REBUILD command to defragment the mapping table

更多“单选题The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. Wh”相关问题

  • 第1题：

    Examine the following steps performed on a database instance： 1. The DBA grants the CREATE TABLE system privilege to the SKD user with ADMIN OPTION. 2. The SKD user creates a table. 3. The SKD user grants the CREATE TABLE system privilege to the HR user. 4. The HR user creates a table. 5. The DBA revokes the CREATE TABLE system privilege from SKD.  Which statement is true after step 5 isperformed（）

    • A、The table created by SKD is not accessible and SKD cannot create new tables.
    • B、The tables created by SKD and HR remain， but both cannot create new tables.
    • C、The table created by HR remains and HR still has the CREATE TABLE system privilege.
    • D、The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.

    正确答案:C

  • 第2题：

    The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? SELECT * FROM HR;（）

    • A、You obtain the results retrieved from the public synonym HR created by the database administrator.
    • B、You obtain the results retrieved from the HR table that belongs to your schema.
    • C、You get an error message because you cannot retrieve from a table that has the same name as a public synonym.
    • D、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product.
    • E、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.

    正确答案:B

  • 第3题：

    Which describes the default behavior when you create a table?（）

    • A、The table is accessible to all users.
    • B、Tables are created in the public schema.
    • C、Tables are created in your schema.
    • D、Tables are created in the DBA schema.
    • E、You must specify the schema when the table is created.

    正确答案:C

  • 第4题：

    Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10：00 P.M. and 10：30 P.M. The next day， you decide to flash back the database. Before you flash back the database， you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table？（）

    • A、 V$DATABASE
    • B、 V$UNDOSTAT
    • C、 V$FLASHBACK_DATABASE_LOG
    • D、 V$FLASHBACK_DATABASE_STAT

    正确答案:C

  • 第5题：

    You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005.You work as a database administrator for your company. A SQL Server 2005 database is utilized in your company. And a table named Inventory is contained by the database. A column named Price is included by the table. According to the company policy， you cannot reduce more than 10 percent the value in the Price column in any single database operation. Through many kinds of method， the company makes updates to the Price column. For instance， the utilization of ad hoc queries is one of the methods. Since you are the database administrator， you should confirm that this company policy takes its effect. Which action should be performed？（）

    • A、A stored procedure should be created， and changes are disallowed by the procedure to the Price column that violates company policy.
    • B、On the Price column， a check constraint should be created， and a specified minimum value is required by the check constraint.
    • C、A trigger should be created， and changes are rolled back by the trigger to the Price column that violates company policy.
    • D、On the Price column， a foreign key constraint is created to a table that valid prices are included.

    正确答案:C

  • 第6题：

    单选题
    Examine the statement:Create synonym emp for hr. employees;What happens when you issue the statement?（）
    A

    An error is generated.

    B

    You will have two identical tables in the HR schema with different names.

    C

    You create a table called employees in the HR schema based on you EMP table.

    D

    You create an alternative name for the employees table in the HR schema in your own schema.


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005.You work as a database administrator for your company. A SQL Server 2005 database is utilized in your company. And a table named Inventory is contained by the database. A column named Price is included by the table. According to the company policy， you cannot reduce more than 10 percent the value in the Price column in any single database operation. Through many kinds of method， the company makes updates to the Price column. For instance， the utilization of ad hoc queries is one of the methods. Since you are the database administrator， you should confirm that this company policy takes its effect. Which action should be performed？（）
    A

    A stored procedure should be created， and changes are disallowed by the procedure to the Price column that violates company policy.

    B

    On the Price column， a check constraint should be created， and a specified minimum value is required by the check constraint.

    C

    A trigger should be created， and changes are rolled back by the trigger to the Price column that violates company policy.

    D

    On the Price column， a foreign key constraint is created to a table that valid prices are included.


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    In your test database， you have created the ORDERS table as an index-organized table （IOT）. To facilitate faster querying， you have created a mapping table and a bitmap index on the ORDER_FILLED column. You observe that the query performance degrees when users perform a large volume of transactions. While investigating the reason， you find that the mapping table segment is fragmented， leading to poor performance. Which option would you use to defragment the mapping table without affecting the original table data？（）
    A

     Export and import the mapping table.

    B

     Drop and re-create the mapping table.

    C

     Truncate the mapping table and reinsert the values.

    D

     Use the ALTER TABLE .. REBUILD command to defragment the mapping table.


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Which describes the default behavior when you create a table? （）
    A

    The table is accessible to all users.

    B

    Tables are created in the public schema.

    C

    Tables are created in your schema.

    D

    Tables are created in the DBA schema.

    E

    You must specify the schema when the table is created.


    正确答案： E
    解析： 暂无解析

  • 第10题：

    单选题
    You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as the administrator of a SQL Server 2005 computer， and the computer is called SQL1. There are two databases on the SQL1， and the two databases are respectively named Production and DW. A new database named Staging is created. When the data are moving from the Production database into the DW database， the Staging database is utilized temporarily to store and manipulate data. Since you are the database administrator， you are required to make sure the points listed below. First， the tables should not be removed from the Staging database. Second， any attempts to have tables migrated should be logged. Third， your solution should not impact on other databases.  Which action should be performed to achieve the goal？（）
    A

    To achieve the goal， a DML trigger on each table should be created to prevent deletion of data.

    B

    To achieve the goal， a DDL trigger should be created， and that the ON DATABASE parameter is utilized by DDL trigger for the Staging database.

    C

    To achieve the goal， an event notification should be created to fire when the TRUNCATE TABLE Transact-SQL statement is submitted to the Staging database.

    D

    To achieve the goal， a DDL trigger should be created， and the ON ALL SERVER parameter is utilized by the DDL trigger.


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10：00 P.M. and 10：30 P.M. The next day， you decide to flash back the database. Before you flash back the database， you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table？（）
    A

     V$DATABASE

    B

     V$UNDOSTAT

    C

     V$FLASHBACK_DATABASE_LOG

    D

     V$FLASHBACK_DATABASE_STAT


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    The ORDERS table belongs to the user OE. OE has granted the SELECT privilege on the ORDERS table to the user HR.Which statement would create a synonym ORD so that HR can execute the following query successfully?（）
    A

    CREATE SYNONYM ord FOR orders; This command is issued by OE 

    B

    CREATE PUBLIC SYNONYM ord FOR orders; This command is issued by OE 

    C

    CREATE SYNONYM ord FOR oe.orders; This command is issued by the database administrator 

    D

    CREATE PUBLIC SYNONYM ord FOR oe.orders; This command is issued by the database administrator 


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Examine the following commands executed in your database： SQL> ALTER SESSION RECYCLEBIN=ON； Session altered  SQL> CREATE TABLE emp TABLESPACE tbsfd AS SELECT * FROM hr.employees；  Table created.  Further， you executed the following command to drop the table：  SQL> DROP TABLE emp； Table dropped.  What happens in this scenario？ （）

    • A、The table is moved to the SYSAUX tablespace.
    • B、The table is moved to the SYSTEM tablespace.
    • C、The table is removed from the database permanently.
    • D、The table is renamed and remains in the TBSFD tablespace.

    正确答案:D

  • 第14题：

    On Monday， you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday， you have a requirement to restore the DEPT table from the recycle bin.  Which statement is correct？（） 

    • A、You can restore the DEPT table by using the Oracle Flashback Drop feature， provided you use the RENAME TO clause.
    • B、You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.
    • C、You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.
    • D、You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of  the recycle bin are purged every 12 hours by default.

    正确答案:A

  • 第15题：

    Examine the following steps performed on a database instance：  1：The DBA grants the CREATE TABLE system privilege to the SKD user with ADMIN OPTION.  2：The SKD usercreates a table.  3：The SKD user grants theCREATETABLE system privilege to the HR user.  4：The HR user creates a table.  5：The DBA revokes the CREATE TABLE system privilege from SKD.  Which statement is true after step 5 is performed（）

    • A、The table created by SKD isnot accessibleand SKD cannot create new tables.
    • B、The tables created by SKD and HR remain， but both cannot create new tables.
    • C、The table created by HR remains and HR still has the CREATE TABLE system privilege.
    • D、The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.

    正确答案:C

  • 第16题：

    Examine the statement: Create synonym emp for hr. employees; What happens when you issue the statement? （）

    • A、An error is generated.
    • B、You will have two identical tables in the HR schema with different names.
    • C、You create a table called employees in the HR schema based on you EMP table.
    • D、You create an alternative name for the employees table in the HR schema in your own schema.

    正确答案:D

  • 第17题：

    You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. A SQL Server 2005 computer is managed by you， and a database named Customers is included by the SQL Server 2005 computer. A table named CustInfo is included by the database. An identity column named CustID and an nvarchar column named CustName are included by the table. According to the company requirement， rows which duplicate CustName values are included should be moved from the CustInfo table every year. However， the company requests to have rows removed from the CustInfo table after the rows have been manually examined and verified as being duplicates. Since you are the technical support， you are required to think out a method to have potential duplicate rows identified for manual examination. The minimum amount of administrative effort should be utilized.  Which action should be performed to finish the task？（）

    • A、A trigger should be created for the CustInfo table so as to roll back INSERT queries that duplicate data is included.
    • B、A new unique index should be created on the CustName column. And then， IGNORE_DUP_KEY = ON should be specified when creating index.
    • C、On the CustName column， a foreign key constraint should be created， and a distinct list of CustName values is referenced by the foreign key constraint.
    • D、A SELECT INTO query should be utilized， and GROUP BY and HAVING clauses should be included by the query to create a new table that contains duplicate rows from the CustInfo table.

    正确答案:D

  • 第18题：

    单选题
    Examine the following steps performed on a database instance：  1：The DBA grants the CREATE TABLE system privilege to the SKD user with ADMIN OPTION.  2：The SKD usercreates a table.  3：The SKD user grants theCREATETABLE system privilege to the HR user.  4：The HR user creates a table.  5：The DBA revokes the CREATE TABLE system privilege from SKD.  Which statement is true after step 5 is performed（）
    A

    The table created by SKD isnot accessibleand SKD cannot create new tables.

    B

    The tables created by SKD and HR remain， but both cannot create new tables.

    C

    The table created by HR remains and HR still has the CREATE TABLE system privilege.

    D

    The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.


    正确答案： C
    解析： 暂无解析

  • 第19题：

    多选题
    On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by issuing the following command: $> sqlldr hr/hr@pdb table=employees Which two statements are true regarding the command?（）
    A

    It succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.

    B

    It fails because no SQL *Loader data file location is specified.

    C

    It fails if the HR user does not have the CREATE ANY DIRECTORY privilege.

    D

    It fails because no SQL *Loader control file location is specified.


    正确答案： C,B
    解析： 暂无解析

  • 第20题：

    单选题
    Examine the following steps performed on a database instance： 1. The DBA grants the CREATE TABLE system privilege to the SKD user with ADMIN OPTION. 2. The SKD user creates a table. 3. The SKD user grants the CREATE TABLE system privilege to the HR user. 4. The HR user creates a table. 5. The DBA revokes the CREATE TABLE system privilege from SKD.  Which statement is true after step 5 isperformed（）
    A

    The table created by SKD is not accessible and SKD cannot create new tables.

    B

    The tables created by SKD and HR remain， but both cannot create new tables.

    C

    The table created by HR remains and HR still has the CREATE TABLE system privilege.

    D

    The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    You discover that the schema changes that were recently made to your SQL Server 2005 database have caused your Web site to stop functioning. It is unclear who made the changes. TestKing.com now mandates that all changes to the database schema be tracked. You need to implement a mechanism that will track schema changes in your database.  What should you do？（）
    A

    Implement a stored procedure that writes data about schema changes to a log table.

    B

    Implement DDL AFTER triggers that write user and schema information to a log table.

    C

    Implement a DML INSTEAD OF trigger that writes data about schema changes to a log table.

    D

    Implement a DML AFTER trigger that writes data about schema changes to a log table.


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    On Monday， you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday， you have a requirement to restore the DEPT table from the recycle bin.  Which statement is correct？（）
    A

    You can restore the DEPT table by using the Oracle Flashback Drop feature， provided you use the RENAME TO clause.

    B

    You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.

    C

    You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.

    D

    You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of  the recycle bin are purged every 12 hours by default.


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    On Monday， you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday， you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct？（）
    A

     You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.

    B

     You can restore the DEPT table by using the Oracle Flashback Drop feature， provided you use the RENAME TO clause.

    C

     You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.

    D

     You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.


    正确答案： D
    解析： 暂无解析

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