MySQL

PHP writes data to a MySQL database in three steps: 1,php and MySQL establish a connection relationship2, open MySQL database3, accept the page data, PHP input to the specified table1, 22 steps can directly use a database link file can: conn.php

A Web page can show "File upload Time" and "number of visitors", not only the history of the article record, but also reflects the popularity of the article's audience. "File Upload Time" and "number of visitors" record method must be many, the

Before a few articles, said recently Tiandi in helping a friend to do a small project, used for statistical telephone number, every time according to the demand from the database randomly generated packaging phone number, and then keep people dozen

When mysql is installed, the star server cannot be started and is stuck in the following interface.Cause analysisThis problem was also encountered when I installed mysql. the INI file has not been copied successfully, we just need to in the mysql

When I first came to the company today, the developers told me that mysql could not be started. I only knew that he had restarted all the services on the test server. At that time, I was so angry, I want to give him 124. If you say you want to

Background:In some technical groups, we can see that some O & M personnel still use commands such as mysqldump to back up MySQL, so we feel it is necessary to introduce innobackupex.Currently, most MySQL-based scenarios use the Master-Slave

In mysql databases, Index building is also a learning. In a table, the index is not the more the better, but the most important thing for your business. When creating an index, we should consider the following points. 1. The smaller the index Field,

Mysql queries the number of records by page or under a certain condition, usually count (), so you know count (*), count (id), or count (name) are there any differences? Take a look at the figure below and you will understand it:  Count (*)

-- SQL statement to obtain the maximum memory usage of mysqlSelect (@ key_buffer_size + @ query_cache_size + @ tmp_table_size + @ response + @ max_connections * (@ sort_buffer_size + @ read_buffer_size + @ @ read_rnd_buffer_size + @ join_buffer_size

Mysql insert into... on duplicate key... can be inserted only because:The first field must be a unique index or unique primary key,The first field must be a unique index or unique primary key,The first field must be a unique index or unique primary

Recently I updated the PHP version. When using the mysql_connect () function, an error is returned: PHP Warning: mysql_connect (): mysqlnd cannot connect to MySQL 4.1 + using the old insecure authentication. please use an administration tool to

I have mentioned in previous articles that mysql data dictionary restoration (using tools to extract MySQL data dictionary directly, without SYS_FIELDS tables). The main data dictionary is as follows, this article mainly explains the significance of

Mysql stored procedure usage tutorialI hope this book will be able to talk to you like an expert, so that you can learn the required knowledge with simple questions and examples. In order to achieve this purpose, I will gradually establish concepts

Using MYSQL for database backup has a very regular database backup method, which has the same concept as other database servers, but have you ever thought about it, mySQL will have a simpler backup method using the file directory, and it will be

It is very sad to lose the password, especially the root password :(. I lost my own installation and play, but it would be too much trouble if the server crashes! It is assumed that the root password is lost due to intrusion. Here I will talk about

If you want to directly store binary data, such as image files and HTML files, in your MySQL database, this article is for you! I will show you how to store these files through HTML forms and how to access and use these files.Overview:Create a new

Now MySQL is used more and more, and I also use it to make my own message board. During use,SlowlyWe need to manage it.The function requires a step-by-step grasp, not only me, but also the requirements of many netizens. Now there are some

If you forget your MYSQL root password, you can recover it through the following process.1. Send the kill command to the mysqld server to disable the mysqld server (not kill-9). The files that store the process ID are usually located in the

◆ The default encoding of the mysql database tutorial is utf8. If this encoding is inconsistent with your php webpage, it may cause mysql garbled characters;◆ When creating a table in mysql, you will be asked to select an encoding. If this encoding

The function of this paper is to avoid the garbled problem caused by the use of UTF-8 encoding in an all-round way, does not contain the specific garbled solution and the content of encoding conversion. For more information about UTF-8 encoding, see