3
我的架構設計是我想從MongoDB中獲取一些信息,從MongoDB的結果
{
"_id" : "23423q53q45345",
"value" : "5942178562002.65",
"dataset" : "GDP (current US$)",
"data" : [
{
"data_name" : "country",
"value" : "india"
},
{
"data_name" : "date",
"value" : "2011"
}
]
},
{
"_id" : "23423q53qdsfsd5",
"value" : "1234238562002.65",
"dataset" : "GDP (current US$)",
"data" : [
{
"data_name" : "country",
"value" : "india"
},
{
"data_name" : "date",
"value" : "2012"
}
]
},
{
"_id" : "213423q45345",
"value" : "6576867562002.65",
"dataset" : "GDP (current US$)",
"data" : [
{
"data_name" : "country",
"value" : "us"
},
{
"data_name" : "date",
"value" : "2011"
}
]
},
{
"_id" : "4564564545dsfsd5",
"value" : "2354353462002.65",
"dataset" : "GDP (current US$)",
"data" : [
{
"data_name" : "country",
"value" : "us"
},
{
"data_name" : "date",
"value" : "2012"
}
]
}
我想印度的數據,2011年
我用這個查詢
db.collection.find({
"data.value": {
"$in": [
"india","2011"
]
}
});
它返回兩個結果
{
"_id" : "23423q53q45345",
"value" : "5942178562002.65",
"dataset" : "GDP (current US$)",
"data" : [
{
"data_name" : "country",
"value" : "india"
},
{
"data_name" : "date",
"value" : "2011"
}
]
},
{
"_id" : "23423q53qdsfsd5",
"value" : "1234238562002.65",
"dataset" : "GDP (current US$)",
"data" : [
{
"data_name" : "country",
"value" : "india"
},
{
"data_name" : "date",
"value" : "2012"
}
]
}
它假設是一個結果
{
"_id" : "23423q53q45345",
"value" : "5942178562002.65",
"dataset" : "GDP (current US$)",
"data" : [
{
"data_name" : "country",
"value" : "india"
},
{
"data_name" : "date",
"value" : "2011"
}
]
}
我知道查詢是錯誤的,但如何做到這一點請大家幫我出
非常感謝你的嚮導 – 2014-09-29 20:35:34