考题
It has been over a century _______ the railway was completed.
(A)when(B) once(C) which(D) since
考题
[A] which [B] that [C] what [D] when
考题
Considerthefollowingcodesnippet:BEGINDBMS_SCHEDULER.SET_ATTRIBUTE(name=,,lne_job1,attribute=,,job_priority,value=1);END;/Ifthiscodewereexecuted,whichofthefollowingstatementswouldbetrue?()
A.Thepriorityofthelne_job1jobwouldbesetto1.B.Thelne_job1jobwouldbeexecutedsynchronously.C.Thelne_job1jobwouldrunimmediatelyintheuserscurrentsession.D.Thelne_job1jobwouldretainitscurrentpriority.E.Thejobwillimmediatelytakepriorityoverallrunningjobs.
考题
Youwanttopurgejobentriesolderthan5daysfromthejoblog.Youdonotwanttopurgewindowlogentries.Whichcommandwillyouusetoaccomplishthistask?()
A.EXECUTEDBMS_SCHEDULER.PURGE_LOG(log_history=5,job_name=’JOB1’);B.EXECUTEDBMS_SCHEDULER.PURGE_LOG(log_history=5,job_name=’JOB_LOG’);C.EXECUTEDBMS_SCHEDULER.PURGE_LOG(log_history=5,which_log=’JOB1’);D.EXECUTEDBMS_SCHEDULER.PURGE_LOG(log_history=5,which_log=’JOB_LOG’);
考题
Youexecutedthefollowingcode:BEGINDBMS_SCHEDULER.SET_ATTRIBUTE(NAME=’JOB_A’,ATTRIBUTE=’JOB_PRIORITY’,VALUE=7);END;/Afteranalyzingtheabovecode,whatconclusionwillyoudraw?()
A.Thecodewillbeexecutedsuccessfully.B.ThecodewillnotbeexecutedsuccessfullybecausethevalueoftheVALUEparametermustbe1,2,or3.C.ThecodewillnotbeexecutedsuccessfullybecausethevalueoftheVALUEparametermustrangebetween1and5.D.ThecodewillnotbeexecutedsuccessfullybecausenoSET_ATTRIBUTEprocedureexistsintheDBMS_SCHDULERpackage.
考题
Which DBMS_SCHEDULER procedure(s) can be used to alter an existing job? ()
A. SET_ATTRIBUTE_NULLB. ALTER_JOBC. ALTER_JOB_PARAMETERSD. ALTERE. SET_ATTRIBUTE
考题
Examine the description of the STUDENTS table:Which two aggregate functions are valid on the START_DATE column?()
A. SUM(start_date)B. AVG(start_date)C. COUNT(start_date)D. AVG(start_date, end_date)E. MIN(start_date)F. MAXIMUM(start_date)
考题
[A] who [B] when [C] where [D] which
考题
The beautiful mountain village__________ we spent our holiday last year is locatedin __________ is now part of Guangxi.A.which ; where
B.where; what
C.that ; what
D.when ; which
考题
【单选题】DATEDIF函数返回两个日期之间的年月日间隔数,其一般形式为:DATEDIF(start_date,end_date,unit),unit参数不可以是()。A.YB.MC.DD.YMD