单项选择题
A.create baseline metrics for today’s performance
B.write the current database metrics to a database table and create a trigger to compare with future database statistics
C.write the current database metrics to a flat file and create an operating script to compare with future database statistics
D.write the current database metrics to a database table and create a procedure to compare with future database statistics
E.write the current database metrics to a database table and submit a job using DBMS_JOB to compare with future database statistics
多项选择题 Youstartedalongtransaction.Beforecommitting，youexecutedaqueryononeofthetablescurrentlybeingmodified.Youreceivedthefollowingerror：ORA-01555：snapshottoooldHowwouldyoupreventsuchanerrorinthefuture？（）
单项选择题 When you try to open your database， you receive the following error： ORA-00205： error in identifying control file Where would you find the details required to resolve this error？（）
单项选择题 OneoftheusersinthePRODdatabase，Adams，complainsthathisupdateonthetable，TRANS，istakinganunusuallylongtimetocomplete.YoufindthatthetablegetslockedbyanotherdatabaseuserbeforeAdamsstartshistransactions，andyouareunabletocontacttheuserholdingthetablelock.AsAdamsisupdatingsomecrucialrowsinthetable，heshouldgetthehighestpriority.Whichmethodwouldyouusetoovercomethisproblem？（）