钢筋混凝土梁、板是房屋建筑中典型的受弯构件，按板的（)情况分，可分为简支板与多跨连续板。A．支承B．

rywindowretentionpolicyusingthecommand：RMAN>CONFIGURERETENTIOHPOLICYTORKCOVFRYWINDOWOF7DAYS；Afterconfiguringtherecoverywindow，youperformedthedatabasebackupasfollows：（）

A.BackupRB1atlogsequencenumber12871on5thJan

B.BackupRB2atlogsequencenumber15622on12thJan

C.BackupRB3atlogsequence16721on15thJan

D.On20thJanwhenthelogsequencenumberwas18112yourealizethatthereIsaneedtoa pointintimeatthebeginningoftherecoverywindow.Youhaveallanhivedredologfilestodate.

stimethantraditionalrecoveries.WhichofthefollowingparametersmustbeincludedinyourinitializationparameterfilebeforeenablingFlashbackDatabase？（）

A.DB_RECOVERY_FILE_DESTonly

B.DB_FLASHBACK_RETENTION_TARGETonly

C.DB_RECOVERY_FILE_DEST_SIZEandDB_RECOVERY_FILE_DESTonly

D.DB_RECOVERY_FILE_DESTandDB_FLASHBACK_RETENTION_TARGETonly

E.DB_RECOVERY_FILE_DEST_SIZE，DB_RECOVERY_FILE_DESTand

F.DB_FLASHBACK_RETENTION_TARGET

A. ABORT

B. NORMAL

C. IMMEDIATE

D. TRANSACTIONAL

A.Nomoredatafilescanbeaddedtothetablespace.

B.Segmentspaceismanagedbyfreelistsinthetablespace.

C.Ausercreatedwithoutbeingassignedadefaulttablespaceusesthistablespace.

D.Thetablespacecanbedroppedwiththecurrentsettingwithsegmentspresentinit.

A.whenyouwanttorestoreatablethathasbeendroppedfromtheRecycleBin

B.whenyouwanttoidentifythetransactionIDofthetransactionthatdeletedsomeimportantrecordsfromatable

C.whenyouwanttorecovertheschemaofadroppeduser

D.whenyouwanttorestoreadroppedtablespace

A. To find the tax percentage for each of the employees.

B. To list the name, job id, and manager name for all the employees.

C. To find the name, salary, and department name of employees who are not working with Smith.

D. To find the number of employees working for the Administrative department and earning less then 4000.

E. To display name, salary, manager ID, and department name of all the employees, even if the employees do not have a department ID assigned.

ecidetoflashthedatabasebacktothetimewhentheschemaexisted.Whichviewwillyouquerytodeterminetheestimatedsizeoftheflashbackdatathatyourequireforyourcurrenttargetretention？（）

A.V$FLASHBACK_DATABASE_LOG

B.V$FLASHBACK_DATABASE_STAT

C.V$DATABASE

D.V$UNDOSTAT

EPARTMENT_ID NUMBERMANAGER_ID NUMBERLAST_NAME VARCHAR2(25)DEPARTMENTSDEPARTMENT_ID NUMBERMANAGER_ID NUMBERDEPARTMENT_NAME VARCHAR2(35)LOCATION_ID NUMBERYou want to create a report displaying employee last names, department names, and locations. Which query should you use to create an equi-join?（）

A. SELECT last_name, department_name, location_id FROM employees , department ;

B. SELECT employees.last_name, departments.department_name, departments.location_id FROM employees e, departments D WHERE e.department_id = d.department_id;

C. SELECT e.last_name, d.department_name, d.location_id FROM employees e, departments D WHERE manager_id = manager_id;

D. SELECT e.last_name, d.department_name, d.location_id FROM employees e, departments D WHERE e.department_id = d.department_id;

tabaseAdministrator.TheSecurityAdministratorinyourorganizationhaskepthumanerrors，suchaserroneouslydroppingusers，tables，andimportantdata，toaminimumbycarefullygrantingonlythenecessaryprivilegestoeachuser.Asaresultofseveralongoingtransactionswithinyourdatabase，youdiscoverthattheflashbacklogsarerapidlyincreasingintheflashrecoveryarea.Toavoidout-of-spaceerrors，youdecidetodeletetheflashbacklogsfromtheflashrecoveryarea.Howcanyoudeletetheflashbacklogsfromthedatabaseifyourdatabaseisupandrunning？（）

A. The transparent encryption of backups uses the encryption wallet

B. The database uses the same encryption key for every encrypted backup

C. The password encryption of backups only uses the password while creating and restoring backup

D. If transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups.