mongodb get field value
跳到 Return Distinct Values for an Array Field. - The following example returns the distinct values for the field sizes from all documents in the ... ,Specifies the fields to return in the documents that match the query filter. ... The following query uses $gt to return documents where the value of qty is greater ... ,find() is enough. db.CollectionName.find(},HomeTown:1}). in java, it would be: BasicDBObject query = new BasicDBObject(); BasicDBObject field = new ... , Not sure what you language implementation is but the basic concept is: var result = [] db.users.find().forEach(function(u) result.push(u.text) }).,MongoDB queries always return document objects, not single values. ... so that you're working with just a single doc instead of the cursor that you get with find . ,db.collection.distinct('x'). should give you an array of unique values for that field. ,Hi guys i am new to mongodb i am trying to write a query to get a single field value from db: "_id" : "vK4PvdNBfBbdv92PH", "ownerId" ... , test is just a JS array. Use normal array syntax to access its elements: var result = Collection.findOne(_id: 'nAwt3b76c24mZfqxz'}).test["30"];.,By default, queries in MongoDB return all fields in matching documents. To limit the amount of data that MongoDB sends to applications, you can include a ...
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 mongodb get field value 相關參考資料
db.collection.distinct() — MongoDB Manual
跳到 Return Distinct Values for an Array Field. - The following example returns the distinct values for the field sizes from all documents in the ... https://docs.mongodb.com db.collection.find() — MongoDB Manual
Specifies the fields to return in the documents that match the query filter. ... The following query uses $gt to return documents where the value of qty is greater ... https://docs.mongodb.com How to retrieve a value from mongoDB, by its key name? - Stack ...
find() is enough. db.CollectionName.find(},HomeTown:1}). in java, it would be: BasicDBObject query = new BasicDBObject(); BasicDBObject field = new ... https://stackoverflow.com How to return only value of a field in mongodb - Stack Overflow
Not sure what you language implementation is but the basic concept is: var result = [] db.users.find().forEach(function(u) result.push(u.text) }). https://stackoverflow.com How to return specific field's value in mongodb - Stack Overflow
MongoDB queries always return document objects, not single values. ... so that you're working with just a single doc instead of the cursor that you get with find . https://stackoverflow.com List all values of a certain field in mongodb - Stack Overflow
db.collection.distinct('x'). should give you an array of unique values for that field. https://stackoverflow.com MongoDB Query How to get one field value? - help - Meteor forums
Hi guys i am new to mongodb i am trying to write a query to get a single field value from db: "_id" : "vK4PvdNBfBbdv92PH", "ownerId" ... https://forums.meteor.com mongoDB: get field value of an array object - Stack Overflow
test is just a JS array. Use normal array syntax to access its elements: var result = Collection.findOne(_id: 'nAwt3b76c24mZfqxz'}).test["30"];. https://stackoverflow.com Project Fields to Return from Query - MongoDB Documentation
By default, queries in MongoDB return all fields in matching documents. To limit the amount of data that MongoDB sends to applications, you can include a ... https://docs.mongodb.com |