单项选择题
A. A subplan has the PLAN_SUB parameter value set to SUB
B. A top-level plan has the GROUP_OR_PLAN parameter set to the name of the subplan in the resource-plan definition
C. There is no difference in the resource-plan definition
D. A subplan always has the CPU_MTH parameter value set to RATIO
E. The string TOP_LEVEL is appended to the name of top-level resource plans
多项选择题 Whichtwostatementsaretrueregardingworkingwithdates?（）
单项选择题 Evaluatethefollowingquery:SQL>SELECTTRUNC(ROUND(156.00,-1),-1)FROMDUAL;Whatwouldbetheoutcome?（）
单项选择题 YouarecurrentlylocatedinSingaporeandhaveconnectedtoaremotedatabaseinChicago.Youissuethefollowingcommand:SQL>SELECTROUND(SYSDATE-promo_begin_date,0)FROMpromotionsWHERE(SYSDATE-promo_begin_date)/365>2;PROMOTIONSisthepublicsynonymforthepublicdatabaselinkforthePROMOTIONStable.Whatistheoutcome?（）