What Is Mapping In Database

February 14, 2014, organized by the National Surveying and Mapping Geographic Information Bureau Surveying and Mapping Development Research Center, "2013 Surveying and mapping geo-Information Blue Book Conference" held in Beijing. The experts introduced the connotation and development status of Wisdom Earth, wisdom China and Intelligent City, analyzed the position and function of surveying and mapping geographical information in the construction of intelligent China, and put forward the thinking, main tasks and safeguard measures of constructing intelligent Chinese geo-spatial intelligence system. 　　The 2013-year survey of Geo-information Blue Book, "intelligent China geo-spatial Intelligence System Research Report (2013)" was officially released. Blue ...

SQLObject 1.1.0 release, SQLObject is a popular Python database object mapping framework, the mapping rule is table-> class, Field-> properties. The Object Relational Mapping tool helps increase productivity by providing classes and objects to manipulate database tables. Python's Best object-relational mapping tool is sqlobject--an open source project that almost completes all the operations required by the programming database. This article introduces SQLObject and its functions. After reading this article ...

Simple mapping is one of the simplest and most basic of object-relational mapping, so learning simple mapping is the prerequisite of mastering inheritance mapping and relational mapping. In recent years ORM (Object-relational Mapping, Object-relational mapping, that is, the mapping of entity objects and database tables) technology market is very lively, a variety of persistent framework came into being, the most influential is the Hibernate and TopLink. Sun is fully absorbing existing excellent ORM especially hibern ...

The "SaaS Pioneer" series continues to present you as a pioneer in the domestic SaaS sector, and today's protagonist, Processon,processon, is a vertical mapping tool and community where users can not only feel a very powerful and useful professional mapping tool, can also easily find their own knowledge resources, inadvertently, may also find a lot of vertical areas of "Daniel" in the sharing of their work. In fact, ProcessOn is to do a cutting-edge, efficient mapping tool, of course, can also be simply understood as "cloud computing era, Microsoft V ...

Single-table policy: This is the default policy in the inheritance map, which is mapped using this mapping strategy, not specifically specified. The mapping principle for this policy is that the parent class, including the newly added attributes in the subclass, is mapped to a database table, and an automatically generated field in the database table is used to store information that distinguishes the different subclasses. Joined-subclass policy: In this mapping strategy, each entity class in the inheritance relationship, whether specific class (concrete entity) or abstract ...

The full name of the Entity framework is the Ado.net Entity framework, the Ado.net based ORM (object/relational Mapping) architecture developed by Microsoft. The main features of the Entity framework: 1. Supports multiple databases (Microsoft SQL Server, Oracle, and DB2); 2. Strong mapping engine, well supported storage ...

Geomajas Hibernate layer 1.8.1 is a plug-in that allows direct access to Hibernate mapping framework in Geomajas mapped database tables. This includes full support for one-to-many and multiple to one attribute. Geomajas Hibernate layer 1.8.1 This is a revised version of the error. Official website: Http://www.geomajas.org/plugin/hibernate-layer

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 ...

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 ...

ODB is an open source, Cross-platform, and Cross-database c++++ Object Relational Mapping (ORM) system. It can place C + + objects into the http://www.aliyun.com/zixun/aggregation/22.html "> relational database, without having to manually write any mapping code for tables, columns, or SQL. ODB the execution transformation between the persistent class and the database that is automatically generated by the compiler, which is a true C + + compiler that can be ported by the C + + compiler ...