Views can be created as read only.;Views can be created on the basis of more than one table.
Q2. Which two statements are true about views A、 A view must only refer to tables in its defining query. B、 The WITH CHECK clause prevents certain rows from being displayed when querying the view C、 Views can be updated without the need to re - grant privileges on the view ...
【63】Which two statements are true about the Oracle ata ictionary?;ata dictionary base tables can be queried directly;ll data dictionary view join base tables to dynamic performance views;It is owned by the SYSTEM user;ata dictionary views are always cr
解析 a The data dictionary describes the database and its objects. b The data dictionary includes two types of objects: base tables and data dictionary views. d The data dictionary records and verifies information about its associated database....
Which two statements are true about the Automatic Workload Repository (AWR)()A.l AWR tables belong to the SYSTEM schema.B.The AWR contains systemwide tracing and logging informat
C、 Delete statements can always be done on a table through a view. D、 Views cannot be used to add rows to an underlying table If the table has columns with NOT NULL constraints lacking default values which are not referenced in the defining query of the view. E、 Views cannot be used...
Which two statements are true of the forwarding table?() A.The forwarding table is stored in the control plane only. B.The forwarding table contains both active and inactive routes. C.The forwarding table is stored in the control plane and the forwarding plane. D.The forwarding table uses ...
Which two statements are true about TCP communication?() A. The receiver acknowledges the final packet in each communications stream. B. The receiver adds sequencing numbers to the packets received. C. The sender adds sequencing numbers to the packets it sends. D. The receiver acknowledges each...
You plan to execute the following command to perform a Flashback Database operation in your database:SQL> FLASHBACK DATABASE TO TIMESTAMP (SYSDATE -5/24);Which two statements are true about this?() A. The database must have multiplexed redo log files B. The database must be in the MO...
For two hours every weekday, a broadcaster named Bryan Fischer hosts “Focal Point,” a popular Christian radio talk show. He is one of the country’s most vocal opponents of what he calls “the homosexual-rights movement.” As he puts it, “A rational culture that cares about its ...