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I. Environment configuration 1. Install mysql and create a new C console Project (from the simplest point of view, this will be done and can be transplanted to any c Project). Set it in vs2010, project -- Property -- VC directory -- contains

Explain analyzes SQL efficiency and explain SQL Efficiency The Explain command is the first recommended command for solving database performance. Most performance problems can be solved simply by using this command. The Explain command can be used

Abstract: In this article, we will solve the problems we will encounter when building a database-driven website. We only use two new tools, PHP and MySQL. If your Web host supports PHP/MySQL, you will save a lot of trouble. If this is not the case,

Abstract: This article describes how to optimize SQL queries. You can manually use the EXPLAIN statement to check the efficiency of SQL queries. In addition, some principles for optimizing SQL statements are described, mainly about how to optimize

A known method is to use session_set_save_handler to take over all session management tasks. Generally, session information is stored in the database, so that all expired sessions can be deleted through SQL statements, precisely control the validity

EXPLAIN I. Purpose: 1. When must I add an index to the table to obtain a faster select statement that can be remembered using the index? 2. Check whether the optimizer joins the table in an optimal order. The official documentation on explain in

To install MySQL in Ubuntu, run the following command at a terminal prompt: sudoapt-getinstallmysql-servermysql-client # midway will let you enter a root user password sudoapt-getinstallphp5-mysql # installation php5-mysql is to connect php and

Recently, I have been getting familiar with MySQL and it is imminent to understand how to optimize it. To do this, you must first sharpen the tool. Recently, I plan to learn about several frequently used tools to optimize MySQL. Today, I will give a

The specific meaning of the return value of the performance test of the explain SQL statement the specific meaning of the return value of the performance test of the explain SQL statement is as follows: mysql> explain select * from table; + ---- + --

There are two prerequisites for changing the root password of MySQL if I forget the root password :? You have the permission to modify the MySQL configuration file. You have the permission to restart the MySQL service. modify the configuration file

For some tips on mysql, if you need it, refer For some tips on mysql, if you need it, refer 1. How to solve the problem of slow import of large batches of disordered data into InnoDB?Because of the primary key clustered index relationship, InnoDB

Web Server apache + mysql + php settings-Linux Enterprise Application-Linux server application information, the following is a detailed description. Web Server Settings Apache + mysql + php is generally considered to be an excellent combination of

This article details the update data of the update statement in mysql. If you need it, please refer to this article. This article details the update data of the update statement in mysql. If you need it, please refer to this article. MySQL UPDATE

For some websites, the content will be updated after a visit. How does this happen? What's the beginning of their front-end? Is it a good template to change the filling content in the background language, or a normal page, and fill the content with

In SQL, we often encounter repeated data. Below I will introduce multiple methods for deleting Repeated Records in mysql. If you need it, please refer to it. In SQL, we often encounter repeated data. Below I will introduce multiple methods for

There are many methods to connect to the database in mysql. If you download the connection directly in mysql command mode, we can divide it into a local connection and a remote connection, and the other is to connect in php mode, I will introduce it

In mysql, if you want to query multiple tables at the same time and the time of multiple tables is related to the query, we have many methods to achieve this. Now we only introduce using mysqlLEFTJOIN. In mysql, if you want to query multiple tables

The following articles mainly describe the actual operations of modifying the alter TABLE structure in MySQL. If you are interested in the actual operations of modifying the alter TABLE structure in MySQL, you can browse the following articles, the

MySQLDatabaseEXPLAINThe usage and precautions are the main content we will introduce in this article. Next let's take a look at this part. 1. EXPLAIN tbl_name is a synonym for DESCRIBE tbl_name or show columns from tbl_name. 2. EXPLAIN [EXTENDED]

This article introduces a method to retrieve the password of mysql. We use -- skip-grant-tables to retrieve the password of a forgotten mysql. If you need it, please refer to this article. This article introduces a method to retrieve the password of