多项选择题
A.They accept only a single argument
B.They can be nested only to two levels
C.Arguments can only be column values or constants
D.They always return a single result row for every row of a queried table
E.They can return a data type value different from the one that is referenced
多项选择题 YouneedtogeneratealistofallcustomerlastnameswiththeircreditlimitsfromtheCUSTOMERStable.Thosecustomerswhodonothaveacreditlimitshouldappearlastinthelist.Whichtwoquerieswouldachievetherequiredresult?（）
多项选择题 Wherecansubqueriesbeused?（）
多项选择题 WhichtwostatementsaretrueregardingtheUSINGandONclausesintablejoins?（）