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.
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.
相关考题：
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多选题You are maintaining a database that is in ARCHIVELOG mode. You have configured the flash recovery area in your database. The database is in MOUNT EXCLUSIVE mode， and you want to configure the Flashback Database feature. Which two options are NOT required to configure the Flashback Database feature？ （）AOpen the database in read-only mode.BSet the retention target with the DB_FLASHBACK_RETENTION_TARGET initialization parameter.CEnable the block change tracking feature.DExecute the ALTER DATABASE FLASHBACK ON statement.
单选题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?（）AUse the Data Block Wizard and base the relation on a REF pointer. BIn 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.CUse the Data Block Wizard, and base the relation on the primary key-foreign key relationship in the database. DThis task is not possible because master-detail relations can be implemented only for blocks based on relational tables.
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?（）AREF cursor. BInstead Of trigger. CStored procedure that returns object values. DThe underlying view cannot be modified because DML on a view is not supported.
单选题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?（）AThe Query Only property is set to Yes. BThe Conceal Data property is set to Yes. CThe Insert Allowed property is set to Yes. DThe Update Allowed property is set to Yes.
单选题You create a data block based on a relation table containing a REF column. You select the REF column for your form module. Which statement about the REF column is true?（）AIt is created as a nondisplay item. BThe Lock Record property is set to Yes. CIt cannot be referenced in item level triggers. DIt is placed on the canvas with the highest sequence number.
多选题You are creating a form that will access an Oracle8 database. On which three sources can you base a data block?（）ABFILEBREF columnCObject tableDColumn objectEINSTEAD-OF trigger
单选题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.