sql vs nosql vs graph

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

, 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

As we all know, relational data types have always been one of SQL's criticism. With the increasing variety of data, the conversion from various data types to relational data types has plagued most SQL database users. However, the advantages of SQL databases are undeniable. If you can have both the fish and the bear's paw-implementing nosql Data Types in the

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 (isolation) IndependenceThe concurrent transactions do not affect each other.If the data to be acc

Transferred from:http://blog.jobbole.com/86269/Although hierarchical databases are still widely used on mainframes today, relational database (RDBMS) (SQL) has captured the database market and performed quite well. The money we save doesn't go to someone else's account, and we make sure we have an exclusive seat on the plane, and we're not going to be blamed for what we didn't do, and so on. The data integrity of a relational database is due to its ad

and write for the whole piece of data.1.4 Vertical Expansion VS Horizontal expansionThe biggest difference between SQL and NoSQL databases may be in scaling, and of course scaling up to support the growing demand. To support more concurrency, SQL database is scaled up, that is, it improves processing power and uses a faster computer, so that processing the same

[It168]Nosql was originally abbreviated as not SQL, and has now evolved into not only SQLBecause developers have realized that, in fact, those who prefer SQL and those who have a lot of SQL experience are moreProgramThe cost of employee employment is lower, and such a person is more likely to be recruited. In fact, i

Tags: using l database to record different strong location business data real-timeDatabase classificationone, SQL database:mysqlSQL Cons:1, in many cases, timely access, is not necessary.2, a lot of things need3, consumption performance.Two, NoSQL database:redis,mongodbGave up 3 points.1, real-time consistency.2, things3, multi-table joint query.MongoDB feature 1, no data structure limitationsA, without the

Tags: mariadb acl redis ora Two kinds of memory cache memory Detail1, first of all, from the database type classification, MySQL, MariaDB, SQL Server These 3 kinds belong to the relational database.NoSQL is a non-relational database and is considered a database revolutionist.Redis becomes a memory cache database, and the previous two types of databases put data on disk, so Redis is faster.See http://blog.csdn.net/allen_a/article/details/50611966Http:/

: This article mainly introduces the differences between NoSQL and SQL. if you are interested in the PHP Tutorial, you can refer to it. Simply put: SQL is a structured query language for relational databases, while nosql generally refers to relational databases. SQL stateme

Reprint Please specify source: Jiq's technical BlogHBase Features:Recently in learning HBase. HBase is indexed based on row health, and queries are fast and in real time.However, HBase is queried based on fields other than row health. Then it can only be a full-fledged scan, which is basically unacceptable.So HBase will generally be designed for detailed application scenarios, using the real-time nature of the query based on row health to achieve real-time query of hbase data.A relational databa

In a nutshell: SQL is a structured query language for relational databases, and NoSQL, the generic reference database, can not be used for SQL statements, although there are leisql query languages, and NoSQL databases do not have a unified query language. Related reference articles read: http://my.

data and safe . two. Non-relational database ( NOSQL):in order to deal with large amounts of data , the relationship between relational database needs to be removed. the initial design of non-relational database is to replace of the relational databaseRedisAdvantages :1, large amount of data deletion and modification, very easy to deal with2, the maintenance of massive data is very easy .Disadvantages :1. There is no relationship between data and da

It is first a search engine rather than a data store (which can actually be used as storage, but not as good as a lot of dedicated storage, but probably enough for small businesses) is an efficient data analysis engine that comes with analytic syntax and is more powerful than other tools Not an all-in-one data analysis tool, such as join query support is not good The primary goal of the analysis is data columns Large data volume, variable column, all columns may have qu

Label:NoSQL systems generally advertise a feature that is good performance and then why? relational database development for so many years, various optimization work has been done very deep, nosql system is generally the absorption of relational database technology, and then, what is the constraints of the relational database performance? We look at this problem from the point of view of system design. 1, index support. relational database at the begi

toss the bottom platform to build and configuration, simple to complete the installation. This is the Gospel for Hadoop beginners.Pull a little bit more, back in the home to share the installation and use of Dkhadoop, today want to share with you is the database of big Data base content: SQL and NoSQL. To understand these two types of data, it is only necessary to clarify the concepts and how they differ.B