2003年城市居民人均消费支出总额为7356元，其中食品消费支出均为（)。A．2800元B．2900元C．3000元D．31

30)JOB_ID VARCHAR2(20) DEFAULT ‘SA_REP‘SAL NUMBERCOMM_PCT NUMBERMGR_ID NUMBERDEPARTMENT_ID NUMBERYou need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below:JOB_ID: Default value specified for this column definition.SAL: Maximum salary earned for the job ID SA_REP.COMM_PCT: Default value specified for this commission percentage column, if any. If no default value is specified for the column, the value should be NULL. DEPARTMENT_ID: Supplied by the user during run time through substitution variable.Which UPDATE statement meets the requirements?（）

A. UPDATE employees SET job_id = DEFAULT AND Sal = (SELECT MAX(sal) FROM employees WHERE job_id = ‘SA_REP‘) AND comm_pct = DEFAULT AND department_id = &did WHERE employee _id IN (103,115);

B. UPDATE employees SET job_id = DEFAULT AND Sal = MAX(sal) AND comm_pct = DEFAULT OR NULL AND department_id = &did WHERE employee_id IN (103,115) AND job _ id = ‘SA_ REP‘;

C. UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = ‘SA_REP‘), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115);

D. UPDATE employees SET job_id = DEFAULT, Sal = MAX(sal), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115) AND job _ id = ‘SA_ REP‘;

E. UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = ‘SA_REP‘) comm_pct = DEFAULT OR NULL, department_id = &did WHERE employee_id IN (103,115);

A.Usethedefaultlayouttoolintheparameterformeditor.

B.Selectmenuitemtool->parameterformbuilder.

C.Opentheparameterformeditorandselectmenuitemstool->defaultlayout.

D.Youcannotdefaultthelayoutoftheparameters.

a. The stored procedure prepare_db ( ) has 10 auditable statements.You run the following statements in the mydb database: Mysql＞ CALL prepare_db ( );Mysql＞ LOAD DATA INFILE ‘/tmp/data.cav‘ INTO TABLE mytable; Mysql＞ SHOW TABLES;How many events are added to the audit log as a result of the preceding statements?（）

A.12; only top-level statements and stored procedure events are logged

B.111; top-level statements and all lower-level statements are logged

C.3; only the top-level statements are logged

D.102; top-level statements are logged, but LOAD DATA INFILE is logged as a separate event

A.Onstartup，SMONcoordinatesinstancerecovery.

B.Onstartup，CKPTcoordinatesinstancerecovery.

C.Onstartup，useRMANtoperforminstancerecovery.

D.Uncommittedchangeswillberolledbackafterthedatabaseisopened.

E.Onstartup，performmediarecoveryandtheninstancerecovery.

F.Onstartup，allthefileswillbesynchronizedandyougetbothcommittedanduncommitteddata.

A.onlineredologfiles

B.alertlogfiles

C.controlfile

D.datafilesassociatedwiththeSYSTEMtablespace

A.0

B.Theresultisundefined.

C.a

D.2

E.1

F.c

G.b

ateamatrixreport.Thequerybuild,youselectthepatient_namecolumnfromthepatienttable;thedoctor_namefromthedoctorstable;andthedoctor_ID,patient_IDandIDcolumnsfromtheproceduretable.Inthereportwizardyouselectpatient_nameastherowvalue,doctor_IDasthecolumnvaluesandthecountasthecellvalues.Youneedtoaddatotalforeachdoctorscolumn.Inthewizardreportwhichtabwillallowyoutocreatethesummarycolumn?（）

A.enablesOracledatabasetoschedulewhichprocessesexecuteonwhichprocessorsinamultipleCPUenvironment

B.enablesOracledatabasetodopatchesaccordingtoaDBA-definedschedule

C.enablesyoutoscheduletheexecutionofjobsbasedontime

D.enablesyoutoexecutejobsinaclusteredenvironment

E.enablesyoutoperiodicallyexecuteoperatingsystemscriptfileslocatedonthesameserverasthedatabase

F.enablesyoutocreateajobthatmakesuseofsavedprogramsandschedules

G.enablesyoutoautomatethemanagementofthejobsthatarecreatedusingtheDBMS_JOBpackage

Database12c. Your database supports a mixed workload. During the day, lots of insert, update, and deleteoperations are performed. At night, Extract, Transform, Load (ETL) and batch reporting jobs are run.The ETL jobs perform certain database operations using two or more concurrent sessions.After the upgrade, you notice that the performance of ETL jobs has degraded. To ascertain the cause ofperformance degradation, you want to collect basic statistics such as the level of parallelism, totaldatabase time, and the number of I/O requests for the ETL jobs.How do you accomplish this?（）

A. Examine the Active Session History (ASH) reports for the time period of the ETL or batch reporting runs.

B. Enable SQL tracing for the queries in the ETL and batch reporting queries and gather diagnostic data from the trace file.

C. Enable real-time SQL monitoring for ETL jobs and gather diagnostic data from the V$SQL_MONITOR view.

D. Enable real-time database operation monitoring using the DBMS_SQL_MONITOR.BEGIN_OPERATION function, and then use the DBMS_SQL_MONITOR.REPORT_SQL_MONITOR function to view the required information.

an100milesawayfromtheprimarysite,connectedovertheInternet.WhichtypeofsessionreplicationinWebLogicisrecommended?（）

A.MANReplication

B.WANReplication

C.SynchronousReplication

D.AsynchronousReplication

E.DatabaseReplication