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relational database design for developersDirectoryThe origin of a Codd RDBMS12 law--rdbmsDesign phase of two-relational databaseThree design principlesFour naming rulesDatabase design, a cornerstone of the success of a software project. Many

User movie scoring data set downloadhttp://grouplens.org/datasets/movielens/1) item-based, non-personalized, everyone sees the same2) user-based, personalized, everyone sees not the sameAfter the user's behavior analysis gets the user's liking, can

1. Give a new name to an already existing type, thus creating a new type: typedef oldtype Newtpye;2, Emum Color{red,orange,yellow,green,blue}; where Color is called an enumeration type, {} is called an enumeration constantBy default, the associative

Original: http://www.tech126.com/git-fetch-pull/There are 2 commands in git that get the latest version from the remote branch to the Local:1. Git fetch: the equivalent of getting the latest version from remote to local, not automatically merge-P

Vertex data, also known as vertex attributes, refers to each vertex data. Refers to the data that can be used to describe each vertex, or a constant value that can be used by all vertices. For example, you want to draw a cube triangle with color.

Newly bought 2T green plate arrived ~ ~ Very happy to say ~ But after all, is the first installation, in advance or on the Internet to search a lot of information to dare to do, the following began ~Environment: CENTOS7, Dell Server, 2T capacity

3, hive installation configuration3.1install MySQLInstalling MySQL on the datanode5# yum-y Installmysql-server MySQL# MySQLMysql> Grant all privileges on * * [email protected] ' 10.40.214.% ' identified by ' hive ';mysql> flush

On the Internet to find a special detailed introduction, write the special fine, everyone slowly look down:As we all know, IP is made up of four numbers, here, let's first look at the Class 3 commonly used IPClass A IP segment 0.0.0.0 to 127.255.255.

LDAP defaults to allow users to access anonymously, such as: When using the tool connection, check the anonymous binding, do not need to enter USERDN and password may be connected to the LDAP server, but only read and search operations. No

Copyright statement: The original author of this article Flying House Studio, thanks to the original studio workshop to share!This AI making logo tutorial is a very useful tutorial. Through this tutorial, flying special friends will learn the AI

WANWAN is a data communication network over LAN geographic rangeBusinesses must purchase services from a WAN service provider. And the LAN is usually classified as a corporate organization that uses the LANDevices connected across a WAN span a wider

Docker Container start multi-service at the same timeReprint please specify from: http://blog.csdn.net/wsscy2004Yesterday I stepped on a sinkhole, I have a basic mirror centos6.5+ssh, is through dockerfile build, using the cmd command to start

Red Hat certified Engineer, a Red Hat certified engineer, is a RHCE certification, Red Hat contributes to the enterprise community with open source operating systems and software, and it also provides training, support, and consulting services to

Valley 2583 Metro Spy (uva1025a spy in the Metro)Address: http://www.luogu.org/problem/show?pid=2583Title DescriptionAgent Maria was sent to S city to perform a particularly dangerous task. She needs to use the subway to do his job, S City's subway

In a recent project, the database was kept in a sub-library due to the large amount of data being accounted for daily. When data is dispersed across libraries, there is a consistency and integrity of the data update operation. The following is a

BOOST Voronoi Visualizer[Email protected]Abstract. The Voronoi extension of the Boost.polygon library provides functionality to construct a Voronoi diagram of a set of s and linear segments in 2D space with some limitations. The paper mainly

/** *  filter for 3 bytes inside utf8 *  @param   $str  *  @return  string */function  FilterUtf8 ($STR) {    /*utf8  encoding table:     * unicode symbol range             | utf-8 Encoding Method     *  u0000 0000 - u0000 007f   | 0xxxxxxx    *  u00

Haproxy implements reverse proxy and load balancingReverse Proxy Server features: web Cache (acceleration), reverse proxy, content routing (forwarding requests to specific servers based on traffic and content types), Transcoder cache: reducing

Comprehensive Analysis of TCP protocol intractable diseases (1) 1. network protocol design ISO puts forward the OSI layered network model, which is theoretical. TCP/IP finally implements a layered protocol model, each layer corresponds to a set of

7 steps to build a better and faster wireless network The goal of wireless networks is always to connect users to the Internet. If we look forward to the wireless networks around us in the next few years, this has not changed. However, wireless