【MongoDB】嵌套數組查詢方案

來源:互聯網
上載者:User

標籤:

From:http://stackoverflow.com/questions/12629692/querying-an-array-of-arrays-in-mongodb

資料

db.multiArr.insert({"ID" : "fruit1","Keys" : [["apple", "carrot", "banana"]]})db.multiArr.insert({"ID" : "fruit2","Keys" : [["apple", "orange", "banana"]]})db.multiArr.find({‘Keys‘:{$elemMatch:{$elemMatch:{$in:[‘carrot‘]}}}}){ "_id" : ObjectId("506555212aeb79b5f7374cbf"), "ID" : "fruit1", "Keys" : [ [ "apple", "carrot", "banana" ] ] }db.multiArr.find({‘Keys‘:{$elemMatch:{$elemMatch:{$in:[‘banana‘]}}}}){ "_id" : ObjectId("506555212aeb79b5f7374cbf"), "ID" : "fruit1", "Keys" : [ [ "apple", "carrot", "banana" ] ] }{ "_id" : ObjectId("5065587e2aeb79b5f7374cc0"), "ID" : "fruit2", "Keys" : [ [ "apple", "orange", "banana" ] ] }

查詢語句:

Interesting question, This will do the trick

db.multiArr.find({‘Keys‘:{$elemMatch:{$elemMatch:{$in:[‘carrot‘]}}}})
$elemMatch used to check if an element in an array matches the specified match expression. so nested $elemMatch will go deeper into nested arrays

【MongoDB】嵌套數組查詢方案

相關文章

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.