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Pradeep Pradhan 21Pradeep Pradhan 21 

Write apex code to store Opportunity records using Map. and display them using foreach loop

PriyaPriya (Salesforce Developers) 
Hi Pradeep,

Here is the sample code :-  
Ma<Id,List<Opportunity>> accountOppMap = new Map<Id,List<Opportunity>>();
for(Opportunity opp : [Select id,accountId from opportunity]){
    List<Opportunity> opplst = AccountOppMap.get(opp.AccountId);
    if(opplst == null)
        opplst = new List<Opportunity>();
    opplst.add(opp);
    accountOppMap.add(opp.accountId,opplst);
}