sql vs nosql vs graph

Reproduced from the original address: http://www.cnblogs.com/loveis715/p/5277051.htmlI recently used a graphical database to support a start-up project. In the process of using this kind of graphics database is actually very interesting. So here's a brief introduction to you.The NoSQL database is believed to have been heard. They can often be used to deal with a series of problems that traditional relational databases are difficult to solve. Typically

Differences between NoSQL and SQL: NoSQL and SQL. About the difference between NoSQL and SQL, NoSQL and SQL simply put:

transaction changes A, then the B must be changed so that the transaction will still satisfy a+b=10, otherwise the transaction fails.3, I (isolation) IsolationThe so-called independence refers to the concurrent transactions do not affect each other, if one transaction to access the data is being modified by another transaction, as long as another transaction is not committed, the data it accesses is not affected by uncommitted transactions.For example, there is a transaction from a to 100 yuan

cite an extreme example. If we have a Cassandra cluster and it's made up of five physical machines. One of the physical machines is 4 times times the capacity of the other physical machines. Then setting the replication factor to 3 o'clock will cause the same data to be stored on a physical machine with a larger capacity. It's not much better than setting it to 2. So in determining the replication factor of a Cassandra cluster, we carefully set an appropriate value based on the number and

exciting than that. MySQL has provided such a function,Source codeHere. Here is a PPT demonstration of the o'reilly MySQL Conference. You can also read a blog of this function developer. Figure 3 NDB with memcached Although MySQL cluster has the advantages of high reliability and seamless expansion, it cannot be satisfied with the efficiency of complex SQL queries. However, MySQL cluster with memcached is a good choice for massive data stora

such a function. Figure 3 NDB with Memcached Although MySQL Cluster has the advantages of high reliability and seamless expansion, it cannot be satisfied with the efficiency of complex SQL queries. However, MySQL Cluster with Memcached is a good choice for massive data storage requirements that rely solely on key-value queries and writes. Summary Because Memcached is simple, lightweight, and has a large number of clients, Memcached-compatible produc

The top 10 SQL and NoSQL databases in the latest statistics, and nosql databases in the latest statistics This ranking is based on the ranking of DB Engines, which analyzes the popularity of 200 different databases on the market. The Top 10 databases are listed here. Undisputed Top 3 Oracle, MySQL, and Microsoft SQL Se

What is neo4j? 1. A high-performance graph relational model database 2. A nosql database 3. multiple types of support Programming Language 4. How can I delete nodes related to a node in neo4j, which is good at processing model data with multiple relationships? 1. Find all links of the target node 2. Start a transaction, delete the Start Node or end node3. traverse all the nodes found and delete the relevan

way, NoSQL comes into being.Second, the definition of NoSQLNoSQL (nosql= not-only sql), meaning "not just SQL," is a new revolutionary movement in the database. NoSQL advocates are advocating the use of non-relational data storage. Most database technologies are not guarant

way, NoSQL comes into being.Second, the definition of NoSQLNoSQL (nosql= not-only sql), meaning "not just SQL," is a new revolutionary movement in the database. NoSQL advocates are advocating the use of non-relational data storage. Most database technologies are not guarant

storage (disk space) is negligible. While non-relational data is stored in a flat dataset, data can often be duplicated. A single database is rarely separated, but stored as a whole, so that it is easier to read and write for the whole piece of data. Vertical Expansion vs Horizontal expansion The biggest difference between SQL and NoSQL databases may be in scaling, and of course scaling up to support the g

relationship between social networks.Relational databases are not good for storing "relational" data, and their queries are complex, slow, and exceed expectations.The unique design of the graphic database makes up for this flaw, and solves the problem that relational database storage and processing complex relational data function is weak.Common Graphics Databaseneo4j: It is a graphical database management system developed by NEO4J,INC. Described by its developers as an ACID-compliant transacti

Tags: style color ar os using SP data div onIn the process of driving big data projects, enterprises often encounter such a critical decision-making problem-which database solution should be used? After all, the final option is often left with SQL and NoSQL two. SQL has an impressive track record and a huge installation base, but

Label: Disclaimer: This article is translated from SQL vs NoSQL the Differences, please specify the source if you want to reprint. SQL (Structured Query Language) database has been a major data storage mechanism for more than 40 years. With the advent of Web applications and open source items like MySQL, PostgreSQL, and SQLite,

enable users to use their knowledge across systems and to support third-party attachments and tools.3. SQL can be extended, and is versatile and time validated, which can solve problems from fast write-driven transmission to scanning intensive in-depth analysis.4. SQL is an orthogonal form of data rendering and storage, and some SQL systems support JSON and othe

. Dziuba's article has aroused a strong reaction in the community due to fierce rhetoric. There are a lot of likes in the SQL database camp. Craigslist engineer Jeremy Zawodny, a famous MySQL expert, said that while reading this article, I may smile from time to time. He said,NoSQL is just a normal phenomenon in the process of Software Evolution. Relational databases will continue to develop. The XtraDB, In

Tags: Step data scientist Architecture agreement New Hope story led meaning avoidanceWhy SQL is beating NoSQL, what this means for future data: http://geek.csdn.net/news/detail/238939 The translator notes: After years of silence, today's SQL is coming back. What's the reason? What impact does this have on the data community? Look at the analysis of this article.

NOSQL systems generally advertise a feature, that is, good performance. why? After so many years of development in relational databases, various optimizations have been done very deeply. NOSQL systems generally use relational database technology. what factors have bound the performance of relational databases? We can look at this problem from the perspective of system design.

NOSQL systems generally advertise a feature, that is, good performance. Why? After so many years of development in relational databases, various optimization work has been done very deeply. NOSQL systems generally use relational database technology. So what factors have bound the performance of relational databases? We can look at this problem from the perspective of system design. 1. Index support At the b

NOSQL systems generally advertise a feature, that is, good performance. Why? After so many years of development in relational databases, various optimizations have been done very deeply. NOSQL systems generally use relational database technology. What factors have bound the performance of relational databases? We can look at this problem from the perspective of system design. 1. Index support. At the beginn