多项选择题
A.methods
B.object tables
C.object columns
D.collection types
E.object as stored procedure parameters
多项选择题 ouneedtocreateadatablockforqueryoperationsintheRETIRED_EMPLOYEESformmodule.Whichthreedatasourcescanyouuseforthisblock?（）
单项选择题 Youwriteaprocedurethatwillbecalledfromtwoleveltriggersandadatabasetrigger.Whereshouldyoustorethiscode?（）
单项选择题 IntheCOURSE_ENROLLMENTformmodule,youdefineamaster-detailrelationbetweentheCOURSES_OFFEREDdatablockandtheSTUDENTdatablock,respectively.Toimplementblockcoordination,whichstatementmustbetrue?（）