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A relational database is designed to conform to certain rules. In particular, database design paradigm is briefly introduced 1NF (first normal form), 2NF (second normal form), 3NF (third normal form) and BCNF, another fourth normal form and fifth

The maintenance and management of dial-up servers is a complex task involving both the server side and the client, software and hardware. It requires administrators to practice more, and good at induction and summary, only in this way, can form a

This document will implement AJAX functionality using the Ajaxpro.net framework: calling the server-side method asynchronously at the client. Ajaxpro.net is an excellent. NET Environment Ajax framework, the use is very simple, you can access the

1, one of the traditional cache (404) This approach is to nginx 404 errors to the back end, and then use Proxy_store to save the back-end of the page. 1, one of the traditional cache (404) This approach is to nginx 404 errors to the back end, and

A Brief introduction: 1. Pop applicable to C/s structure of the offline model of the e-mail protocol, has been developed to the third edition, said POP3. Offline models do not operate online, unlike IMAP4 (Netscape support IMAP4) 2. When a client

WWW, some people call it the Web, is the application of the current Internet, the fastest growing network information services, but also the most convenient and most popular information service types. Its biggest feature is integration, it can

Servlet Filters can add additional actions before the request arrives in the JSP or servlet or before the response returns to the client. If you have multiple JSP pages and a servlet that require an identical or similar operation, we can extract the

At first, Microsoft offered to push technology (Direct push technology) as part of the Exchange Server 2003 SP2. Push technology allows mobile device users to also be able to receive mail messages. More importantly, this technology allows security

Always wanted to write a "content marketing" related articles, see Small white in micro-blog Marvel, decided to start pen. or according to past practice, start with the basic concept of the topic (content Marketing) discussed today. First, the

xml| objects The Microsoft.XMLHTTP object is provided in MSXML to perform the conversion from the packet to the request object and to send the task. The statement that creates the XMLHTTP object is as follows: Set Objxml =

Xml Remote management Technology of database An important link in the modern application of Internet based WAN is the remote monitoring of database. First of all, a brief review of the Internet Database Remote management technology development

Recently found a problem, a friend asked me the special symbol set in the title, what is the impact of optimization? Common special symbols are:,, _, "〖〗◇" "‖:" "" () (){}, and so on. The following is a detailed analysis of the most common use of

For non-banks and other stringent requirements of the business, if a record appears or does not appear in the search record, it is within tolerable bounds, so the deadlock should first be considered as to whether our business logic tolerates or does

Since the username and password are all made up of a-z,a-z,0-9 characters, I refer to the regular expression of the algorithm, it has been the idea: the user entered the user name and password to judge, see whether it is the composition of these

1, on the Web site, classification directory for the high weight of the site, the link is still bound to be disseminated. But for the weight of a small station, the role is very limited. But the station is difficult to include, small stations are

xml| Data | refresh | no refresh Traditionally, we browsed the Web to add the latest data. It can only be displayed when we re requesting the server side. However, for some time-sensitive websites, the traditional approach is not enough.

Article Introduction: The situation is more complex, if an operation to wait until the completion of more than one asynchronous Ajax request, there will be a callback function nesting situation, if you need to nest several layers, then you can only

A year ago we reported a very strange name of a website Urlfan, at that time we thought it was a good internet "influence index". Urlfan ranked the site according to the popularity of the blog reference number. And Alexa and compete and other data

For a long time did not write articles, today to talk about the network Alliance's strategy and how to use the Network Alliance way to lock the search front end of the crowd. First I explain the search front, search front refers to the lack of

　　 Add a Struts configuration file Considering that the library module is a relatively self-contained module, in order to avoid a team project overlay or conflict due to resource contention on the Struts profile, we provide a separate new struts