nosql column database

As we all know, the nosql movement aims to become a substitute for traditional relational database management systems in the big data era. Ravendb is a good example of Microsoft's changing attitude towards open source. Microsoft's acceptance of ravendb (nosql database) surprised many people. Ravendb can easily replace

Naresh Kumar is a software engineer and passionate blogger who has a great interest in programming and new things, and is happy to share technical research with other developers and programmers. Recently, Naresh wrote about 12 well-known free, open source NoSQL databases, and analyzed the characteristics of these databases.Now that NoSQL databases are getting more and more popular, I've summed up some great

Guide: Kristóf Kovács is a software architect and consultant who recently published an article comparing various types of NoSQL databases.Although SQL database is a very useful tool, the monopoly is about to be broken after 15 years of a single show. This is only a matter of time: forced to use relational databases, but eventually found to be unable to adapt to the needs of the numerous.But the difference b

,,What is the design principle of nosql? Is there a paradigm similar to that of relational databases? I also found an article:Http://www.cnblogs.com/AllenDang/p/3507821.html! CommentsBasically, the design idea is what I mentioned above: Put the blog and comments together.This reduces the number of queries.However, a problem occurs if the user's nickname changes.Isn't every blog commented by this user going to be modified ???? Modify the relational

Label:Original source: http://www.searchdatabase.com.cn/showcontent_88247.htmHere are some excerpts:The latest big data innovations include: Oracle Big Data Discovery is a "visual Hadoop" and is an end-to-end product that is designed to discover, explore, transform, mine, and share with the insights of big numbers. Big data assets will be leveraged by more business analysts within the enterprise to help reduce risk and accelerate the value transformation of big data projects. Oracle Gol

In the previous article, we discussed the main differences between SQL and NoSQL databases. Next, we'll use the knowledge in the previous article to determine how to determine the better choice in a particular scenario.First, let's summarize:SQL database: You need to define the underlying schema before using the table encourage use of normalization to reduce data redundanc

Although SQL database is a very useful tool, the monopoly is about to be broken after 15 years of a single show. This is only a matter of time: forced to use relational databases, but eventually found to be unable to adapt to the needs of the numerous.But the difference between NoSQL databases is far more than two of the differences between SQL databases. This means that the Software architect should choose

First, the basic knowledge of NoSQL1. About NoSQLIn the word "NoSQL". is actually created by a colleague called Racker, when John Evanseric to organize an event to discuss open source distributed databases.This is the name and concept.Some people oppose the NoSQL term because it sounds like we define what we are. To a certain extent, but the long-term is still valuable. Since when a relational

Guide: Kristóf Kovács is a software architect and consultant who recently published an article comparing various types of NoSQL databases . The article is compiled by Agile translator – Tang Yuhua . For reprint, please refer to the following statement.Although SQL database is a very useful tool, the monopoly is about to be broken after 15 years of a single show. This is only a matter of time: forced to use

Tags: style java using OS io strong file dataAn example of a simple NoSQL memory database-berkeley DB Basic operationRecently, due to the development of cloud computing, database technology has evolved from a structured database to a NoSQL

The main characteristic of Cassandra is that it is not a database, but a distributed network service composed of a bunch of database nodes, a write operation to Cassandra will be copied to the other nodes, and the read operation to Cassandra will be routed to a node to read. For a Cassandra cluster, scaling performance is a simple matter, just add nodes to the cluster. Here are a number of reasons to choose

transactions in the database (transaction) have ACID4 basic features that can be compared to trading:1,A (atomicity) atomicityEverything in the transaction is either completed or failed during execution and is rolled back.2,C (consistency) ConsistencyThe database should be in a consistent state.For example: Existing integrity constraints a+b=10, if a transaction changes A, then B must be changed3,I (isolati

With the development of Internet technology, the traditional relational database can not be satisfied with the storage and analysis of massive data, thus deriving a database NoSQL (not only SQL) which is different from the relational database.The more mature nosql in foreign countries have mongodb,cassandra,tokumx and

, triggers 5. MongoDB first release : 2009 Licensing mechanism : Open source whether SQL: no The most popular NoSQL database, but retains some of the SQL attributes, such as high performance on query and index large datasets, which is good for dynamic queries and index definitions to support Linux, OS X, and Windows, but the size of the database is limited to 2.5

is the ID of this table that can be associated with other tables later # used to correlate the main table place_x place_y place_zTable IV (for saving player_inveneory) # This is the ID of this table that can be associated with other tables later # used to correlate the main table InveneoryAt this point the relational database will have the different structure of the event storage in the same way, and then stored as follows (I do

Label:Recently, the well-known independent benchmark evaluation agency Bankmark, for the current mainstream NoSQL database sequoiadb, MongoDB and Cassandra three NoSQL database products to do performance comparison testing and release test reports. in all of the tests, the three No