Finding Ledger Dimension by using MainAccount Number in X++

static void getLedgerDimension(Args _args)
{
DimensionAttributeValueCombination     dimensionAttributeValueCombination;
MainAccount                                             mainAccount;
;
select RecId,MainAccount from dimensionAttributeValueCombination
                join RecId from mainAccount
                  where dimensionAttributeValueCombination.DisplayValue == "1010"
                     && mainAccount.RecId == dimensionAttributeValueCombination.MainAccount;

info(strFmt("Ledger Dimension - %1",dimensionAttributeValueCombination.RecId));
}


                                                or 

we can find by using the method "getDefaultAccountForMainAccountNum()" which is available in DimensionStorage


static void getLedgerDimension(Args _args)
{
   DimensionStorage::getDefaultAccountForMainAccountNum("1010");
}