MySQL

In MySQL, when we set the primary key ID to auto-increment mode, for example, the current maximum primary key ID is 8, so how can we specify the primary key ID of the next inserted record as 100, as long as the following SQL statement is used:

If phpMyAdmin is enabled, change the root password in the permission, and then open phpMyAdmin. "phpMyAdmin tries to connect to the MySQL server, but the server rejects the connection. Check the host, user name, and password in config. Inc. php and

1. The installation steps are as follows: 1. Uninstall the original version 5.0. A dependency error is reported during normal uninstallation. Use rpm-e -- nodeps to solve the problem. In addition, we need to unmount the related conector and

Proportion: the content of the field is 12. 34567. I want to extract the exact two digits after the decimal point 12.34. However, the number of digits before the decimal point is not fixed. You can use the following method.   Instr (STR, substr)

  Software List: The software version used in this article is as follows:: Python-2.5.2.msi Apache_2.2.10-win32-x86-no_ssl.msi Django-1.0.2-final.tar.gz Mod_python-3.3.1.win32-py2.5-Apache2.2.exe Mysql-5.1.37-win32.msi Step 1: Install

Background Knowledge 1: During the maintenance of the Master/Slave database, you sometimes need to skip a command that cannot be executed. When slave is in the Stop State, run set global SQL _slave_skip_counter = n to skip the command. N = 1 is a

Today, in Ubuntu, when I use eclipse to connect to the MySQL database, the mysql_init () undefined error always occurs. Later I found that I needed to add a static Link Library to the project. The following describes how to connect eclipse + CDT to

There is a table with more than 0.1 million data records. An example of a column of data is as follows: 100000-200000-300001 100000-200000-300002 100000-200001-300003 100000-200001-300004 100000-200002-300005 When the query data contains200001,

MySQL management-master-slave synchronization Management MySQL master-slave synchronization architecture is currently one of the most widely used database architectures, especially for websites with large loads. Therefore, it is very important to

Master Database: 192.168.40.4 DB: testsyn table: UsersSlave Database: 192.168.40.5 1. Configure the master database my. CNF [Mysqld] Log-bin = mysql-testsyn-bin -- prefix of the binary log file name in the master database BINLOG-Do-DB = testsyn -

How can I set MySQL System variables to optimize performance? (1) back_log:The number of connections that MySQL can have. When the main MySQL thread receives a lot of connection requests in a very short period of time, this works, and then the main

Recently developed systems use MySQL as a database. Because the data involves money, you have to exercise caution. At the same time, the user also puts forward requirements for the maximum traffic. To prevent MySQL from becoming a performance

1. Modify the character encoding of a Database Mysql> alter database mydb Character Set utf8; 2. Specify the character encoding when creating a database Mysql> Create Database mydb Character Set utf8; 3. view the character encoding of the MySQL

1. install Apache$ Sudo apt-Get install apache2Test:Enter http: // 192.168.21.20./ in the browser/192.168.21.20.for Ubuntu IP 2. install PHP$ Sudo apt-Get install PhP5$ Sudo apt-Get install libapache2-mod-php5$ Sudo/etc/init. d/apache2 restart Test:

Master-slave MySQL master-slave Database Configuration 1./etc/My. CNF master database configuration # Generally, it already exists.Server-id = 1# Databases to be copiedBINLOG-do-DB = search# Databases that do not require

I. Startup Mode 1. Start with service: Service mysqld start 2. Use the mysqld script to start:/etc/init. d/MySQL start 3. Start with safe_mysqld: safe_mysqld & Ii. Stop 1. Start with service: Service mysqld stop 2. Use the mysqld script to

1) Environment Windows Server 2008r2 64bit + MySQL 5.5.16 for 32 bit + MySQL ODBC connector 64 bit 2) error message In the specified DSN, the architecture between the driver and the application does not match 3) Cause Because you use the 64

Recently, this project requires the MySQL database to be used in the background, but the foreground must be in the form of C # and ASP. NET. In the past, I learned a set of things from Microsoft, such as SQL Server and LINQ. net is very easy to

To optimize MySql in high concurrency, it is necessary to understand the lock table mechanism when MySQL queries an update. I. Overview MySQL has three levels of locks: Page, table, and row. The MyISAM and memory storage engines use table-level

"And God said, Let there be network: and there was timeout"During the use of MySQL, have you ever encountered many puzzling timeouts?After these timeouts, is it a code issue or is it unknown?In this issue, we will describe the timeout of the MySQL