MySQL

Unix_timestamp () Unix_timestamp (date) Returns a UNIX timestamp (the number of seconds since ' 1970-01-01 00:00:00′gmt) If no parameter calls are invoked. If Unix_timestamp () with a A date parameter is invoked, which returns the number of

We discussed the database performance optimization on the other hand, that is, the use of database server built-in tools to analyze and optimize. ▲show Perform the following command to understand the running state of the server: MySQL >show status;

MySQL supports one-way, asynchronous replication, in which one server acts as the primary server and one or more other servers act as the server. The master server writes the update to the binary log file and maintains an index of the log file to

MySQL's official website download address: http://www.mysql.com/downloads/ In this download interface there will be several versions of the selection. 1. MySQL Community Server Community version, open source free, but does not provide official

Regular Expressions (regex) are a powerful tool for defining complex queries. here is a simple information that ignores some of the detailed information. A regular expression defines a rule for a string. The simplest regular expression does not

　　1, download mysql free installation version/binary plate software (Do not compile) File format: mysql-version-os.tar.gz 　　2, the creation MySQL group, establishes the MySQL user and joins in the MySQL group (in different versions of UNIX, the

Today, while doing a mini-letter wall lottery program, I encountered a problem, I need to query the difference set of scale, the business situation is this A table is used to save lottery users (www.111cn.net a person may have more than one piece

  usually in the production of the installer, data Backup program will use this code, I think there is not much online, and some are not very good, sometimes this code directly with ready-made can save a lot of time, then I transferred from the

In the work practice and study, how to open the MySQL database remote landing account is a difficult problem, the following content is summed up in the work and practice of the two steps, can help the DBA to successfully open the MySQL database

js|mysql| process In the process of configuring JSP development environment will encounter a lot of problems, thanks to the experience of many predecessors on the Internet, the author cl41 JSP connection MySQL database introduction and author Saulzy

Although a lot of online, or here to record their own installation process, and some experience, do not have to install and then everywhere to find. First say MySQL, because he can say completely independent and Apache, PHP installation is not

mysql| Data | Data Directory 10. Section 2 discusses the structure of the data directory in its default configuration. All databases and status files are included. However, administrators have certain responsibilities in the layout that determines

mysql| Program | Data you must have used the phpMyAdmin inside the database import, export function, very convenient. But in practical applications, I found the following questions: 1, the database exceeds a certain size, such as 6M at this time

ODBC refers to the Open data connection, which is the Microsoft-led data driver, it can be connected to other data, through the SQL language to operate the data, of course, PHP also provides a function of the ODBC data connection, Using PHP to

Campus Forum is one of the indispensable parts of campus network. Although the forum based on Asp+access simple, easy to install, but the MySQL database with its short, convenient, fast, free and so on the advantages of many sites are currently the

When you use mysqldump to back up MySQL, the backup file is a text file in SQL format, consisting of a series of CREATE TABLE and INSERT statements. When recovering, just use the SQL file as input to the MySQL program, as follows: Mysqldump mydb

Offers: Zstack cloud computingContent IntroductionThere are a large number of SQL database language implementations on Linux and Unix-like systems. MySQL and mariadb are two of the most popular options.However, as with most software, these tools can

Shell statements that connect data in a scriptMysql_user= ' Zabbix ' mysql_pwd= ' 123456 ' mysql_host= ' 127.0.0.1 "mysql_port= ' 3306 ' mysql_conn= '/usr/local/mysql/bin/ Mysqladmin-u${mysql_user}-p${mysql_pwd}-h${mysql_host} "-p${mysql_port}"It

Analysis of slow query logs by pt-query-digest in MySQL, ptquerydigest I. Introduction Pt-query-digest is a tool used to analyze mysql slow queries. It can analyze binlog, General log, and slowlog, you can also use SHOWPROCESSLIST or MySQL protocol

Key features of InnoDB-insert cache, write twice, adaptive hash index details, innodbhash Key features of the InnoDB Storage engine include insert buffer, double write, and adaptive hash index ). These features provide better performance and higher