Database Many To Many Relationship Problem

The last chapter introduces the basic data partitioning scheme and the basic configuration scheme based on the user 6184.html "> Data table". But in the 2.0 era, this simple list index has been far from being a problem, and many-to-many relationships will be the most common relationship. Now, we present the elaboration and the concrete behavior judgment for the many-to-many relationship which is widely existed in the web2.0 data. For example, a very simple example, in the 2.0 era, friend function is the most commonly used, each user will have a lot of friends, but also will be a lot of people's friends, then this data ...

The database server is actually the foundation of every electronic transaction, financial and enterprise resource Planning (ERP) system, and it often includes sensitive information from business partners and customers. Although the data integrity and security of these systems are important, the level of security checks taken against the database is not as high as the security measures of the operating system and the network. Many factors can disrupt data integrity and lead to illegal access, including complexity, poor password security, misconfigured, undetected system backdoor, and mandatory routine use of adaptive database security methods ...

The necessity of database encryption large database management system platform is typically Windows NT and Unix, these operating system security level is usually C1, C2 level. They have user registration, user identification, Arbitrary access control (DAC), audit and other security functions. Although the DBMS on the basis of the OS added a number of security measures, such as access control based on permissions, but the OS and DBMS on the database file itself is still lack of effective protection measures, experienced online hackers will "bypass", directly using the OS tools to steal or tamper with the database files ...

The scalability of the system is the main reason for promoting the development of NoSQL movement, including distributed system coordination, failover, resource management and many other features. That makes NoSQL sound like a big basket that can be stuffed with anything. Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to extensive research and practice on protocols and algorithms. It is through these attempts to gradually summarize some effective database construction methods. In this article, I will focus on the distributed features of the NoSQL database ...

China IDC Circle July 16 reported: Manufacturers lock is a common problem of many cloud deployment. We all know a historic it challenge: The more a company uses a specific vendor's product or service, the higher its reliance on the vendor and its product services, and the more difficult it is for companies to change vendors. Even when you renew a contract with an existing vendor, this can lead to a lack of initiative in the negotiation process. Manufacturers know that the cost of enterprise change manufacturers is very high, the difficulty is very good, so both take its light, enterprises will inevitably accept the requirements of manufacturers price increases. Lower utilization rate ...

The scalability of the system is the main reason for promoting the development of NoSQL movement, including distributed system coordination, failover, resource management and many other features. That makes NoSQL sound like a big basket that can be stuffed with anything. Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to extensive research and practice on protocols and algorithms. It is through these attempts to gradually summarize some effective database construction methods. In this article, I will focus on the NoSQL database distributed special ...

Storing them is a good choice when you need to work with a lot of data. An incredible discovery or future prediction will not come from unused data. Big data is a complex monster. Writing complex MapReduce programs in the Java programming language takes a lot of time, good resources and expertise, which is what most businesses don't have. 　　This is why building a database with tools such as Hive on Hadoop can be a powerful solution. Peter J Jamack is a ...

Introduction with the advent of the cloud computing era, various types of Internet applications are emerging, the relevant data model, distributed architecture, data storage and other database related technical indicators also put forward new requirements. Although the traditional relational database has occupied the unshakable position in the data storage, but because of its inherent limitation, has been unable to satisfy the cloud computing age to the data expansion, reads and writes the speed, the support capacity as well as the construction and the operation cost request. The era of cloud computing has put forward a new demand for database technology, which is mainly manifested in the following aspects. Mass data processing: to ...

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.

At home, a lot of marketing people's knowledge of database marketing is very shallow level, simply think that database marketing is to use a database to do sales can, such as holding a group of customers to call, fax, send e-mail, send text messages, to pass the enterprise product information. In fact, this is the implementation of database marketing, is a database marketing extension. The Real database marketing project is actually a complex system of marketing activities, including, database planning, establishment, data analysis, data statistics, data Mining, data modeling ...