AuserexecutesaqueryontheEMPtable，whichcontainsthousandsofrows，togetdetailsaboutemployeesinoneofthedepartments.Theuserreceivesthefollowingerror：SQL>SELECTenameFROMempWHEREdeptno=10ORDERBYsalSELECTenameFROMempWHEREdeptno=10ORDERBYsal*ERRORatline1：ORA01157：c
题目
AuserexecutesaqueryontheEMPtable，whichcontainsthousandsofrows，togetdetailsaboutemployeesinoneofthedepartments.Theuserreceivesthefollowingerror：SQL>SELECTenameFROMempWHEREdeptno=10ORDERBYsalSELECTenameFROMempWHEREdeptno=10ORDERBYsal*ERRORatline1：ORA01157：cannotidentify/lockdatafile201seeDBWRtracefileORA01110：datafile201：’/u01/app/oracle/oradata/orcl/temp01.dbf’Whatisapossiblereason？（）
A.Thetempfilebelongingtothedefaulttemporarytablespaceismissing.
B.Thedatabaseisopenedinrestrictedmode，soqueriesarenotallowed.
C.Thedefaulttemporarytablespacerequiredtoexecutethequeryisoffline.
D.Thedefaulttemporarytablespacerequiredtoexecutethequeryisdropped.
E.Thedefaulttemporarytablespacerequiredtoexecutethequeryisreadonly.