Mysql No Database Selected

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PHP operation MySQL 3rd pass the first day

This paper introduces how to build a network database application method by MySQL of the golden combination of Web database, PHP is a server-side embedded hypertext Processing language similar to Microsoft ASP, it is a powerful tool to build dynamic website. While MySQL is a lightweight SQL database server that runs on a variety of platforms, including Windows NT and Linux, and has a GPL version, MySQL is considered the best product for building a database-driven dynamic Web site. PHP, MySQL, and Apache are Linux ...

Summary of MySQL database optimization method

Intermediary transaction SEO diagnose Taobao guest Cloud host technology Lobby database optimization is a very complex task, because it ultimately requires a good understanding of system optimization.   Even though the system or application system does not know much about the optimization effect is good, but if you want to optimize the effect of better, then you need to know more about it. 1, the optimization of the system to run faster the most important factor is the basic design of the database.   And you have to be aware of what your system is going to do, and the bottlenecks that exist. The most common system bottlenecks are as follows: ...

MySQL database backup basics

Usually when we use the MySQL database, often because of operational errors caused by data loss, MySQL database backup can help us to avoid due to various reasons, data loss or other problems with the database. First, the data backup shortcut Because this method has not been the official official document validation, we tentatively called the experiment. Purpose: Backup hostA host a MySQL database backup TestA, and restored to the hostB machine in the test environment: Operating System: WinNT4.0, Mysql3.22.34, phpM ...

Several ways to relocate MySQL database and possible problems

Intermediary trading ">seo diagnose Taobao guest cloud host technology Hall do station will inevitably do site relocation, and in the site relocation work, The most important and most troublesome work is undoubtedly the relocation of the database, because once the database file is lost and deleted the source of backup, the site will be faced with extinction, your efforts will be destroyed. So what are the ways to move the database now, and ...

Preferred Mysql,wix use 4 Web servers to support 54 million user sites

"Editor's note" WiX has been operating the site for a long time, and after the launch of the WYSIWYG web platform based on HTML5, users have established more than 54 million sites in the company, and most of these sites have less than 100 solar PV. Since the PV of each page is low, the traditional caching strategy does not apply. Even so, however, the company has done so with only 4 Web servers. Recently, WiX chief back-end engineer Aviran Mordo in "...

The first knowledge of the sqlyogent of MySQL management tool

Intermediary transaction ">seo diagnose Taobao guest cloud host Technology Hall If you choose PHP to build the site, then you must understand PHP to build a database, The MySQL data is necessary. Just contact PHP friend may be unfamiliar with this MySQL database, but if there is a very useful database management tools, it is more convenient to use, the author a few days ...

How to solve mysql#1366 errors in combat

Intermediary transaction ">seo diagnose Taobao guest cloud host technology Hall mysql# 1366 error is in mysql5.0.2 above version, whether the code or the field does not conform to the rules, will not pass MySQL strict data inspection, #1366错误就是这样出现的. Of course, if you have the right to modify My.ini, usually #1366 is very good ...

Mysql database sql statement commonly used optimization methods

MySQL database sql statement commonly used optimization methods 1. Query optimization, should try to avoid full table scan, should first consider where and order by the columns involved in the establishment of the index. 2. Should be avoided in the where clause on the field null value judgment, otherwise it will cause the engine to abandon the use of indexes and full table scan, such as: select id from t where num is null You can set the default value of num 0, to ensure that Num column table does not null value ...

2017 double 11 technology secret - Alibaba database technology architecture evolution

Every year, the e-commerce double 11 singles day promotion is a big test for Alibaba technicians, especially for the Alibaba database team.

Windows 2003 Iis6+php5+mysql5+zend Environment-New Beginner's tutorial

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology Hall Windows 2003 Iis6+php5+mysql5+zend Environment set up the latest novice tutorial first, the system agreed to download the Environment software storage location: D:\ServerSoft Environment Software Installation location: D:\Se Rverroot PHP Installation Location: D:\ServerRoot\PHP MySQL Installation location: D:\ServerRoot\MySQL Zen ...

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