nosql database schema design

, the second student, has a special node named nickname. This feature makes XML more responsive to changes than relational databases in some scenarios. Advantages: Natural hierarchical structure The text content is self-interpreted by tags. The XML schema can be verified through XSD (XML schema language ). There are many auxiliary technologies such as XPath, XQuery, XSL, and XSLT. Some

Tags: database designDatabase design (i)--Database design IntroductionAccording to the standard design, the database design process is divided into six stages:A, the system requirements

file. Applicable scenarios: Suitable for storing data with a small amount of data and hierarchical structures, such as tree configuration information Nosql Database I am not familiar with many non-relational databases, but do not provide many product names. There are some articles in the garden. This article also provides links for you to learn and study. 1. Key-value

this database. A : the corresponding e-R figure is shown in Figure 4. 4. A hospital ward Computer Management Center needs the following information: Department: Branch name, branch address, branch telephone, doctor name Ward: Ward number, bed number, department name Doctor: Name, title, department name, age, work permit number Patient: Medical record number, name, sex, diagnosis, doctor in charge, Ward number Among them, a section of how many wards,

7, a library lending management database requirements for the following services: (1) The variety, quantity and location of existing books in the stacks can be inquired at any time. All types of books can be uniquely identified by the ISBN. (2) At any time to check the books to borrow, including the borrower's unit, name, library card number, library date and return date. We agree: Anyone can borrow a variety of books, any kind of books can be borrow

In fact, I have been preparing the basic materials for another blog post, but I chatted with my friends and asked me what I was doing recently. I said I was working on the System Log Module, after talking with him, this blog came into being. My blog directory: Index writing plan All data can be expressed as follows: ID, table name, column name, and value For example, there is a data entry into the user table: ID (guid, int for ease of understanding) Username Password Email

are linked to the same dimension. Data mart can be considered as a group of dimensions of a single large fact table (or a star schema of one or two fact tables) and its link.8.1.4 database model AdjustmentThe biggest problem with database model adjustment is that the adjustment must be carried out in the design phase

Scheme 2 The second solution uses two Tag tables, one of which stores Tag information and the other stores ing information: Tag table:Copy codeThe Code is as follows:Tagid # ID of the tagTagname # tag contentNum # number of references to the current TagTagmap tableCopy codeThe Code is as follows:TagidAidArticle tableCopy codeThe Code is as follows:ID # Article IDTitle # article titleTags # tags list, separated by commas... In this form, the Tag table and Tagmap table are updated each time the c

opinion is a pair of many relationships, the relational database into a NoSQL document database, that is, from table to collection, such as 4 as an embedded document, asset details stored in the document as many.Figure 4Because the approval opinion is related to the process, the flow through the process link and the approval opinion correspondence, therefore, th

the ideal database design tools, such as: SyBase Company's powerdesign, she supports the PB, VB, Delphe and other languages, through the ODBC can connect to the market popular more than 30 databases, including DBase, FoxPro, VFP, SQL Server, etc. I will highlight the use of powerdesign in the future. Get Data Schema Resource Manual People looking for sample patt

The process of database design Database technology is the most effective means of information resource management. Database design refers to a given application environment, constructs the best database model, establishes the

One, the distinction of the concept Some people confuse object-oriented database design (i.e. database schema) with object-oriented database management system (OODBMS) theory. In fact, the former is a database user-defined

Label: MongoDb compared to the traditional SQL relational database, the biggest difference lies in their schema design (schema) differences, it is because this level of differences derived from other aspects of the difference. we can simply think that the relational databaseconsists of three hierarchical concepts of

1. Database design: The process of planning and structuring the relationships between the data entities in the database and the data entities; a good database design:Save storage space for datato ensure the integrity of the datafacilitate the development of database