Relational Database Table Relationships

As a software developer or DBA, one of the essential tasks is to deal with databases, such as MS SQL Server, MySQL, Oracle, PostgreSQL, MongoDB, and so on. As we all know, MySQL is currently the most widely used and the best free open source database, in addition, there are some you do not know or useless but excellent open source database, such as PostgreSQL, MongoDB, HBase, Cassandra, Couchba ...

SaaS is generally considered to be a provider for the enterprise to build the information required for all network infrastructure and software, hardware operating platform, and responsible for all the implementation of the prophase, the maintenance of the latter series of services, enterprises do not need to buy hardware and software, building rooms, recruiting IT staff, can use the Internet Information systems 　　Just like opening a tap to water, an enterprise leases software services from a SaaS provider, depending on the actual needs. At present, many multinational information technology industry companies in the world are developing SaaS based products and services to provide a technology platform for the future development of the Internet.

After more than eight years of practice, from Taobao's collection business to today to support all of Alipay's core business, and in the annual "Double Eleven Singles Day" continue to create a world record for the transaction database peak processing capacity.

Designing 1 applications doesn't seem to be difficult, but it's not easy to achieve the optimal performance of the system. There are many choices in development tools, database design, application structure, query design, interface selection, and so on, depending on the specific application requirements and the skills of the development team. This article takes SQL Server as an example, discusses the application performance optimization techniques from the perspective of the background database, and gives some useful suggestions. 1 database design to achieve optimal performance in a good SQL Server scenario, the key is to have 1 ...

HBase is a column-oriented distributed database. HBase is not a relational database, and its design goal is to solve the limitation of the theory and implementation of relational database in processing massive data. The traditional relational database was designed for the trading system in the 70 's to satisfy the data consistency (ACID), and did not consider the scalability of data scale expansion, and the reliability of single point system failure. Although after many years of technical development, has produced some to the relational database patching (parallel database), however is limited by the theory and the realization about ...

(Author Srini penchikala translator Dingxuefeng) for non-relational data types such as documents, object graphs, and key-value pairs, the NoSQL database provides them with an alternative way to store data. Can distributed caching be used as a NoSQL database? Ehcache's Greg Luck author describes the similarity between distributed caching and NoSQL databases. Infoq interviewed him and discussed the pros and cons of the scheme. InfoQ: Can you do a distributed caching solution with the NoSQL database ...

The five major database models, whether relational or non relational, are the realization of some data model. This article will give you a brief introduction of 5 common data models, so that we can trace back to the mysterious world behind the current popular database solutions. 1. The relational model relational model uses records (composed of tuples) for storage, records stored in tables, and tables are defined by the schema. Each column in the table has a name and a type, and all records in the table conform to the table definition. SQL is a specialized query language that provides the appropriate syntax for finding records that meet the criteria, such as ...

1. Languages used in COUCHDB: Erlang features: DB consistency, easy to use license: Apache protocol: http/rest bidirectional data replication, continuous or temporary processing, processing with conflict checking, therefore, The use of Master-master replication (see note 2) mvcc– write without blocking read operation Pre-save version crash-only (reliable) design requires data compression view: Embedded mapping/Reduce formatted view: List display support for server ...

In the past few years, relational databases have been the only choice for data persistence, and data workers are considering only filtering in these traditional databases, such as SQL Server, Oracle, or MySQL. Even make some default choices, such as using. NET will typically choose SQL Server, and Java may be biased toward Oracle,ruby, Mysql,python is PostgreSQL or MySQL, and so on. The reason is simple: In the past a long time, the relational database is robust ...

Applications cannot be separated from data, and cloud computing applications are supported by data. Windows Azure Service Platform, Microsoft Cloud Computing Services platform provides storage Service--windows Azure storage to store data for cloud applications and, of course, SQL Azure to store relational data. Windows Azure Storage consists of three important parts or three storage data services: Windows ...