YouareplanningtoimportcustomerdatafromtheCustomertableandtheCountrytableinyourSQLServer2000databaseintoaSQLServer2005database.Youwanttoensurethatduringtheimportprocess，eachvalueintheCountryCodecolumnoftheCustomertablehasacorrespondingrecordintheCountryCod
题目
YouareplanningtoimportcustomerdatafromtheCustomertableandtheCountrytableinyourSQLServer2000databaseintoaSQLServer2005database.Youwanttoensurethatduringtheimportprocess，eachvalueintheCountryCodecolumnoftheCustomertablehasacorrespondingrecordintheCountryCodecolumnintheCountrytableoftheSQLServer2005database.Youdefineaforeignkeybetweenthesetwotables.Thus，referentialintegritywillguaranteethattheimportroutinefailsifthereareanyrecordswhereaCountryCodevaluedoesnotexistintheCountrytablebutdoesexistintheCustomertable.YouneedtoensurethattheimportprocessdoesnotfailifrecordsareencounteredthatdonotexistintheCountrytable.
Whatshouldyoudo？（）