单选题The EMP_DEPT block in your EMPLOYEE form is based on a view in an Oracle8 database. The items in this block have the Update Allowed property set to Yes. Which database feature makes it possible to permanently modify the underlying view?（）A REF cursor.

题目

单选题

The EMP_DEPT block in your EMPLOYEE form is based on a view in an Oracle8 database. The items in this block have the Update Allowed property set to Yes. Which database feature makes it possible to permanently modify the underlying view?（）

REF cursor.

Instead Of trigger.

Stored procedure that returns object values.

The underlying view cannot be modified because DML on a view is not supported.

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第1题

You create a data block based on a relational table containing a REF column. You select the REF column for your form module. What is true about the items based on the REF column attributes?（）A、The Query Only property is set to Yes. B、The Conceal Data property is set to Yes. C、The Insert Allowed property is set to Yes. D、The Update Allowed property is set to Yes.

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第2题

he data blocks in your form module are based on object tables. How would you create a master-detail relationship between two of these blocks?（）A、Use the Data Block Wizard and base the relation on a REF pointer. B、In the Object Navigator, select the Relation node under the master block and click the Create icon. Build the relation manually and coordinate the blocks using triggers.C、Use the Data Block Wizard, and base the relation on the primary key-foreign key relationship in the database. D、This task is not possible because master-detail relations can be implemented only for blocks based on relational tables.

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第3题

The EMP_DEPT block in your EMPLOYEE form is based on a view in an Oracle8 database. The items in this block have the Update Allowed property set to Yes. Which database feature makes it possible to permanently modify the underlying view?（）A、REF cursor. B、Instead Of trigger. C、Stored procedure that returns object values. D、The underlying view cannot be modified because DML on a view is not supported.

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第4题

You have configured OMF in your database. You enabled the ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； statement to enable the block change tracking feature. What information will be written in the change tracking file？（）A、 the system change numberB、 the locations of the redo log filesC、 the locations of the datafilesD、 the physical location of all the database changes

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第5题

You execute the following RMAN commands in the order shown below： BACKUP VALIDATE DATABASE; BLOCKRECOVER CORRUPTION LIST; What will these commands do？（）A、create a backup of the database and recover all corrupted blocks found in the backupB、run a backup validation and list all the logically corrupt blocks as well as physically corrupt blocks in the databaseC、run a backup validation to populate V$COPY_CORRUPTION view， and then list any corrupt blocks recorded in the viewD、run a backup validation to populate V$DATABASE_BLOCK_CORRUPTION view， and then repair any corrupt blocks recorded in the viewE、run a backup validation， repair any corrupt blocks found during the validation process， and then update V$DATABASE_BLOCK_CORRUPTION view to indicate which corrupt blocks have been repaired

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第6题

You execute the following RMAN command in the order shown below： BACKUP VALIDATE DATABASE； BLOCKRECOVER CORRUPTION LIST； What will these commands do？（）A、 Create a backup of the database and recover all corrupted blocks found in the backup.B、 Run a backup validation and list all the logically corrupt blocks as well as physically corrupt blocks in the database.C、 Run a backup validation to populate V$COPY_CORRUPTION view， and then list any corrupt blocks recorded in the view.D、 Run a backup validation to populate V$DATABASE_BLOCK_CORRUPTION view， and then repair any corrupt blocks recorded in the view.E、 Run a backup validation， repair any corrupt blocks found during the validation process， and then update V$DATABASE_BLOCK_CORRUPTION view to indicate which corrupt blocks have been repaired.

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第7题

In the COURSE_ENROLLMENT form module, you define a master-detail relation between the COURSES_OFFERED data block and the STUDENT data block, respectively. To implement block coordination, which statement must be true?（）A、 The Enforce Primary Key property on the STUDENT block is set to Yes. B、 The Alias property on the COURSES_OFFERED block is set to Student. C、 The Copy Value from item property on the foreign key item in the STUDENT blocks is set to the primary key item of the COURSES_OFFERED block. D、 The Synchronize with item property on the foreign key item in the STUDENT block is set to the primary key item of the COURSES_OFFERED block.

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单选题The EMP_DEPT block in your EMPLOYEE form is based on a view in an Oracle8 database. The items in this block have the Update Allowed property set to Yes. Which database feature makes it possible to permanently modify the underlying view?（）A REF cursor.

题目

更多“单选题The EMP_DEPT block in your EMPLOYEE form is based on a view in an Oracle8 database. The items in this block have the Update Allowed property set to Yes. Which database feature makes it possible to permanently modify the underlying view?（）A REF cursor. ”相关问题

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