我想运行聚合查询，它也有查找功能吗？

Question

我在Mongodb中运行聚合查询

db.Data_Urls.aggregate([{$group : {_id : "$Urls", Done:{$sum:1}}}])

所以结果就像

{ 
    "_id" : "hassan", 
    "Done" : NumberInt(1)
},    
{ 
    "_id" : "ahmed", 
    "Done" : NumberInt(3)
},    
{ 
    "_id" : "naveed", 
    "Done" : NumberInt(1)
},    
{ 
    "_id" : "ali", 
    "Done" : NumberInt(1)
},    
{ 
    "_id" : "haroon", 
    "Done" : NumberInt(2)
}

我想在同一查询中过滤Done值，只获取值为1的Done值？

Answer 1

db.Data_Urls.aggregate([
     {$group : {_id : "$Urls", Done:{$sum:1}}},
     {$match : { Done: 1 }}
])