From which country did you taste the most ~distinct~ beers?
db.beer.aggregate( [
{ '$group' : {
'_id' : '$brewery_country',
'beers' : { '$addToSet' : '$beer_name' },
} },
] ).pretty()
Result:
{
"_id" : "Portugal",
"beers" : [
"Cheers Sem álcool",
…
"Super Bock Preta Sem Alcool"
]
}
{
"_id" : "Canada",
"beers" : [
"CID Rosé",
…
"Revenante",
]
}