单项选择题
A.Create the relation manually and coordinate the blocks using triggers.
B.Base the relation on a REF pointer using the Data Block Wizard.
C.Base the relation on a foreign key using the Data Block Wizard.
D.This task is not possible because master-detail relations can be implemented only for blocks based on relation tables.
单项选择题 AsalesanalystreviewsthefirstdraftonyourSalesapplication,andrequeststhattheapplicationgraphicallyrepresentrevenuegeneratedforeachsalesrepresentative,inadditiontothetextualdatacurrentlydisplayedfortheORDERblock.Howwouldyouincorporatethisgraphicinyourform?（）
单项选择题 Youarebuildingtwoforms.Eachformhasabuttonandanon-basetablefield.Whenthebuttonispressed,acomplicatedcalculationisexecuted.Thecalculationisthesameforbothforms.The calculationcodedoesnotqueryorchangethedatainthedatabase.Whenthecalculationcompletes,itreturnsasinglevaluetothenon-basetablefield.Tooptimizeperformanceandmaintainability,whichPL/SQLstructureshouldbeused?（）
单项选择题 Thesystemanalystshaverequestedheavyuseofobjectfeatures.ThedatabasedesignmakesuseofPL/SQL8objecttypes,methods,andLOBtypes.Howdoyouworkwiththesefeaturesontheclient?（）