MongoDB

1, including date query from the start time to the end timeBasicdbobject queryobj = new Basicdbobject ();Queryobj.put ("Date", new Basicdbobject (). Append ("$gte", StartTime). Append ("$lt", Endtime));2, DISTINCT queryBasicdbobject queryobj = new

MONGODB2.6 's rights management and 2.4 are very different, the Internet can see the basic articles are based on 2.4 below, many do not apply. After some groping finally straightened out 2.6 of the rights management, take notes.The version I'm using

First, explain functionThe explain function can provide a large number of query-related information, and if it is a slow query, it is the most important diagnostic tool. For example:Query on fields that have an index:> db.post.find ({"loc.city": "NY"

The index and relational database indexing concepts and functions of MongoDB are the same:(1) Non-indexed search can be called full table sweep, that is, the server must find a complete table in order to query the entire result;(2) After the index

DocumentThe document is the basic data structure in MongoDB, such as: {"name": "Jack", "LastName": "XI"} key-value pairs are ordered , and {"LastName": "XI", "name": "Jack"} is different. Each document has a special key _id, which is unique . The

1. Download the installation file from MongoDB website: (download zip is recommended)Http://www.mongodb.org/downloads2. Create a folder in the C drive-MongoDB3. Unzip the zip package to C:\MongoDB, now the file structure is as follows:4. Create a

MongoDB Learning Note 1 installs MongoDB based on CentOS 6.5http://281816327.blog.51cto.com/907015/1598270MongoDB Learning Note 2 basic knowledge of MongoDBhttp://281816327.blog.51cto.com/907015/1598275MongoDB Learning Note 3 handles MongoDB

MongoDB Replica Set is the officially recommended master-slave replication and high availability scheme for MONGODB, which replaces the original Master-slave master-slave replication scheme. The REPLICAT set has automatic switching, and when primary

1 , check if there is Yum SourceYum Info Mongo-10gen2 , add Yum SourceVi/etc/yum.repos.d/mongodb.repo Enter the following content:[MongoDB]Name=mongodbrepositorybaseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/Gpgcheck=0Enabled=13 ,

Transferred from: http://www.cnblogs.com/Showshare/p/mongodb-quickly-install.htmlThe previous article, "Mongodb.webide: The upgraded version of MongoDB management tools," missing something: It is about the MongoDB master and slave library

Pymongo Introduction:Python-provided operation for the drive of MongoDBSoftware acquisition: Https://pypi.python.org/pypi/pymongo#downloadsInstallation method:1th: Download the source code process installation#tar XF

These days the project revision, time is tight, blog also did not follow, also hope everyone forgive.Well, today we share the basic operation of the index in MongoDB, we do not have to develop the daily development of the program to optimize

In MongoDB there is another cluster, that is, sharding technology, similar to the SQL Server table partition, we know that when the amount of data reached the T level, our disk, memoryThat's how we deal with this scenario.One: ShardMongoDB uses a

What?One of the most popular non-relational databases. Document-oriented databases are fundamentally different from relational databases in terms of data storage.Why? Simple to useAdaptable to SQL-based DB for changing business

On the way to NoSQL, not only mongodb deserves attention.Recently test a tokumx out of MongoDB, calculate a derivative bar!Know mSQL people, perhaps not unfamiliar to this company!First: Tokumx MongoDB access method:Official website:

Continue the learning of MongoDB--Detailed index--Index management--Spatial Index1. Create a simple index(1) Prepare 200,000 data firstfor (var i = 0;iDb.books.insert ("number": I, "name": i+ "book")}(2) Check the query performancevar start = new

1. PurposeThe question is so simple that I think I should write an article for a long time, but for starters, anything that hasn't been touched is likely to be a stumbling block, so this blog is designed to keep track of the road, not the level.2.

when setting up a MongoDB replica set, the primary node, the second node, the quorum node, and possibly the resource configuration (CPU or memory) are unbalanced, so it is required that some nodes cannot be primaryWe know the settings of MongoDB:In

A scalar (non-array element) in the document must match each statement in the query condition. For example, if you use {"X": {"$GT": Ten, "$lt": 20} The query will only match documents with the value of "X" key greater than or equal to 10 and less

MongoDB is a very common document-oriented non-relational database, mainly used in micro-blogging, blog, IM and other message storage business, because the data stored in the financial industry and other industries are not so important, and there is