how to query mongodb in java

The problem I'm encountering is someone else mongodb storing the picture information in key , for img , value an url array. When I use php an mongodb extension to query, the img field returns a string, but what I want to get is the array object that was deposited, what method can I get to an object of an array type? My

Tags: des style blog http os io using Java ARMongoDB fuzzy Query and $type use2012-09-11 14:13:30| Category: MongoDB | Tags: | report | font size small subscription recently has a monitoring business, because the data collection to non-digital content, resulting in the monitoring chart can not display properly, so to find this part of the data, delet

This article introduces how to use $ or and sort () to query performance analysis in MongoDB. If you need it, let's take a look at it. If you don't design thousands of records for your website, the server will be stuck. The Code is as follows: Copy code Mongos> db. find ({"user": "jhon"}). sort ({"name ":1}). limit (100). explain (){"Cursor": "BtreeCursor user_1 ","Nscanned": 10100,"

The requirement is to query for a period of time, some of the schedule is repeated each year (month, day), how to get the schedule within a find? The repetition means that the addition of the May 1 schedule of this year, I query next April-May schedule, still can find his I hope I can give you a clue Reply content: The requirement is to query for a period of

Tags: style blog color using OS IO data issuesRecently, when using MongoDB, I encountered a scene with multiple keywords for fuzzy query. The bamboo wind uses the Mongoengine library.Looked up all kinds of information, and finally summed up the more useful methods. First, the code, followed by detailed instructions. As follows:1 #!/usr/bin/env python2 #Coding:utf-83 4 ImportRe5 ImportMongoengine6 fromMongo

) [status] ] => string (1) "A" ["Time"] => int (1500134400) } [1] => Array (5) { ["_id"] => object ( Mongodb\bson\objectid) #13 (1) { ["oid"] => string (a) "5a51fffb83869e5bf002656c" } ["cust_id"] = > String (3) "001" ["Amount"] => int (a) ["Status"] => string (1) "A" ["Time"] => Int ( 1502726400) } [2] => Array (5) { ["_id"] => object (Mongodb\bson\objectid

Tags: text cts rdb ted xxxxx BMS Find xxx MonMongoDB versus RDBMS Where statement comparison Operation format Example similar statements in an RDBMS Equals {} db.col.find({"by":"XXXX"}).pretty() where by = ‘XXXX‘ Less than { db.col.find({"likes":{$lt:50}}).pretty() where likes Less than or equal to { db.col.find({"likes":{$lte:50}}).pretty() where likes Grea

Mongodb Study Notes 2 (simple addition, deletion, query, and modification) 1. add a piece of data. I also practiced it yesterday, and today it is further consolidated. There are two main methods: save and insert. Example: db. blog. save ({"name": "taotao", "address": {"city": "beijing", "post": "100096"}, "phone ": "64645646"}) or db. blog. insert ({"name": "taotao", "address": {"city": "beijing", "post": "

embedded objects Db.postings.find ({"Author.name": "Joe"}); Note that usage is author.name, just use one point. More detailed can see this link: dot notation As an example: > Db.blog.save ({title: "My first Post", Author: {Name: "Jane", Id:1}}) If we want to query authors name is Jane, we can do this: > Db.blog.findOne ({"Author.name": "Jane"}) If not, then you need to use the following sentence to match: Db.blog.findOne ({"Author": {"name": "Jane",

Tags: style blog http io os ar java for SPJava Operation MySQL Database code we have a very familiar, and additions and deletions, Java to the MongoDB database is similar to the operation, first database connection, and then the operation.First we enter into the admin database, and then set up their own database Testmongodb, access to the admin database, you can