Mongodb 如何在mongo db中查找不同的记录
我在MongodB中插入以下记录Mongodb 如何在mongo db中查找不同的记录,mongodb,distinct,record,Mongodb,Distinct,Record,我在MongodB中插入以下记录 { "_class" : "mkcl.os.transformer.PayloadObject", "_id" : ObjectId("53763e6fe4b00e612650c18c"), "dataMap" : { "gpsLocation" : "Latitude: 18.6099243, Longitude:73.7710601,Altitude:0.0", "85" : "Prahlad Sing
{
"_class" : "mkcl.os.transformer.PayloadObject",
"_id" : ObjectId("53763e6fe4b00e612650c18c"),
"dataMap" : {
"gpsLocation" : "Latitude: 18.6099243, Longitude:73.7710601,Altitude:0.0",
"85" : "Prahlad Singh",
"86" : "25",
"88" : "16/05/14",
"92" : "",
"89" : "Male",
"91" : "Single",
"87" : "Pune",
"90" : "Employement"
},
"formId" : NumberLong(22),
"imageUrls" : {},
"isDeleted" : false
}
有很多这样的记录。现在,我需要基于键86、89和90的不同记录
我正在使用query db.payloadObject.distinct('dataMap.86'),它根据值key-86返回不同的记录。我不理解如何根据这些条件获取值 Useaggregate可以返回不同的复合键,如
db.payloadObject.aggregate([{
$group : {
_id : {
86 : "$dataMap.86",
89 : "$dataMap.89",
90 : "$dataMap.90",
}
}
}]);
Useaggregate可以返回不同的复合键,如
db.payloadObject.aggregate([{
$group : {
_id : {
86 : "$dataMap.86",
89 : "$dataMap.89",
90 : "$dataMap.90",
}
}
}]);
Useaggregate可以返回不同的复合键,如
db.payloadObject.aggregate([{
$group : {
_id : {
86 : "$dataMap.86",
89 : "$dataMap.89",
90 : "$dataMap.90",
}
}
}]);
Useaggregate可以返回不同的复合键,如
db.payloadObject.aggregate([{
$group : {
_id : {
86 : "$dataMap.86",
89 : "$dataMap.89",
90 : "$dataMap.90",
}
}
}]);