MySQL

In MySQL, table locks are not deadlocked for storage engines that use table-level locking. This is managed by always requesting all necessary locks at the start of a query and always locking the table in the same order. In a table with frequent

The MySQL database is an open source database based on structured data. The SQL statement is the core language in the MySQL database. However, in the MySQL database to execute SQL statements, you need to be careful two traps. Trap one: null value

This paper is a fast and precise grasp of the SELECT statement in MySQL database. The basic syntax for a SELECT statement in MySQL is: The following is a reference fragment:SELECT [Straight_join] [Sql_small_result][Sql_big_result]

First, the basic theory In the MySQL large data processing, horizontal table technology is very common, but the table technology has brought a large number of PHP processing costs, in order to solve the drawbacks of Mysql5.1 later in a plug-in way

Oneproxy Read/write separationI. Oneproxy read and write separationPrimary server (Master): 192.168.32.150Slave server (slave): 192.168.32.129Oneproxy Middleware Server: 192.168.32.150 1. First Configure master-slave replication and

Like most relational databases, log files are an important part of the MySQL database. MySQL has several different log files, usually including error log files, binary logs, generic logs, slow query logs, and so on. These logs can help us locate

MySQL Server has four types of logs--error log, General Query log, Binary log, and Slow query log.The first one is the error log, which records some of the mysqld errors. The second is the general query log, which records what MYSQLD is doing, such

First, Introduction　　　　MySQL master-slave replication, the previous time the production environment deployed a master-slave replication of the architecture, at that time now found a lot of information, now recordedSecond, topology diagramThird,

Example 1, get MySQL versionInstalling the MySQL module in a Windows environment for Python developmentMysql-python windows under EXE installation file downloadCopy CodeThe code is as follows:#-*-Coding:utf-8-*-#安装MYSQL DB for PythonImport MySQLdb

Tag:handler    Execution time     file    max    low memory     sql query    request   read   err    There are many articles on the web to teach how to configure MySQL server, but considering the different server hardware configuration, the

Today, I want to test the powerdesigner knowledge base (repository) on my PC and find that I need to use the MySQL ODBC driver to connect to MySQL. On the MySQL official website http://dev.mysql.com/downloads/connector/odbc/download, because I use

========================================================== ====================================== Supplement 1: ========================================================== ======================================MySQL character encoding is introduced

130: the file format is incorrect. (The error is not clear yet) 145: the file cannot be opened. 1005: An error occurred while creating the MYSQL table.　　1006: MYSQL database creation failed　　1007: the MYSQL database already exists. An error occurred

InnoDB Storage engine notes,Chapter 2 Mysql architecture and storage engine 1st define a set of databases and instance databases: databases, physical operating system files, or other forms of file types. When using the NDB storage engine, database

Detailed MySql installation and uninstallation tutorials, mysql uninstallation tutorials This article provides you with a tutorial on installing and uninstalling MySql for your reference. The specific content is as follows: 1. Install MYSQL 1. Open

MySQL Online DDL Improvement and Application, mysqlddlThis article analyzes the implementation principle and precautions of Online DDL. For any DDL operation, the performer must perform a pre-test or clearly understand whether the impact of this

The following articles mainly describe ASP. NET to connect to the MySQL database. If you encounter ASP. NET connection to the MySQL database, but you do not know how to solve it correctly, then the following article must be a mentor for you. Because

The MYSQL Cast function is a very important MYSQL function. The following describes the syntax and usage of the MYSQL Cast function in detail, hoping that you can have a better understanding of the MYSQL Cast function. BINARYThe BINARY operator

Oracle released the MySQL reference architecture for large-scale scalable Website Infrastructure White Paper, which provides a recommended topology for websites of different types and sizes that use MySQL as data storage. Provides four types of

Mysql ERROR "ERROR 1206 (HY000): The total number of locks exceeds the lock table size" solution 1. problem background InnoDB is the default storage engine of the new MySQL version (v5.5 and later). The default engine of the previous version is