MySQL

  Miscellaneous Functions Name Description Default () Return the default value for a table column Get_lock () Get a named lock Inet_aton () Return the numeric

MySQL provides this very powerful thing, but the documentation has limited instructions, so that you may doubt MySQL's capabilities! Is a session-level quasi-system variable generated, maintained, and recycled by the server similar to MySQL

ArticleDirectory Install the MySQL Module Connect to database Focus on inserting and updating data   Install the MySQL Module Sudo easy_install mysql-Python Connect to database 1 # ! /Usr/bin/ENV Python 2 # Coding =

High Availability MySQL p59 Security and binary logs   Generally, a user with the replication slave permission has the permission to read all events on the master. Therefore, to ensure security, the account should not be damaged. Here are some

Step 1:Yum-y install mysql-Server Step 2: modify the configuration file[Root @ sample ~] # Vim/etc/My. CNF plugin edit the MySQL configuration file[Mysqld]Datadir =/var/lib/MySQLSocket =/var/lib/MySQL. Sock# Default to using old password format

Some time ago, when I made a website, I used a MySQL database and EMS MySQL manager to create and manage databases. One of the tables has an auto-incrementing primary key ID, because the default auto-increment Data Type of the table created by EMS

Today, I am depressed. in LinuxProgramI can't find a table, but I have created a table. I can also find it in the MySQL command line. why can't the program find the table?   Later, I asked a teacher to solve the problem. It turns out that MySql in

Generally, query logs and slow query logs can be written to the OS file system or as a log table of the MySQL system! The log strap brings a lot of convenience, and of course it will bring a certain amount of system load to MySQL! Need to weigh.

!! Assume that all installation packages are in the/share directory. The installation directory is/OPT !! $ Ll/share-RW-r -- 1 Root 129041873 Nov 29 mysql-5.1.54-linux-i686-glibc23.tar.gz ==========================================================

When I modified a table field yesterday, I found that the master-slave replication synchronization failed, but the synchronization process was not faulty, and the MySQL Log was not faulty. I carefully searched for the cause, it is found that the

Therefore CopyCode The Code is as follows: create_time datetime default now () It is impossible to set the default value.The alternative is to use the timestamp type instead of the datetime type.Current_timestamp: When I update this record, this

Let me introduce it today. Linux Lower Lamp ( Apache + PHP + MySql ). Apache + MySQL + PHP Install RedHat Under OPT Directory Httpd , MySQL And PHP Directory to allow access through a browser Phpinfo And PhpMyAdmin The final

(To debug this demo, copy the mydb subdirectory in the directory to the data subdirectory In the MySQL installation directory (my files are: D: \ Program Files \ mysql \ MySQL Server 5.0 \ data) abstract: This article describes in detail how to

1. Download the MySQL Installation File To fully install MySQL, the following six files are required: MySQL-server-community-5.1.26-0.rhel4.i386.rpm MySQL-client-community-5.1.26-0.rhel4.i386.rpm

// Primary key AlterTable tabelname add new_field_id int (5) unsigned default 0 not null auto_increment, add primary key (new_field_id ); // Add a new column Alter table T2 add D timestamp;Alter table Infos add ex tinyint not null default '0 ';

Using indexes in database tables can greatly improve the query speed. Suppose we have created a testindex table:Create Table testindex (I _testid int not null, vc_name varchar (16) not null ); We randomly inserted 1000 records into it, one of

From: http://dzh.mop.com/whbm/20111117/0/llzg8OI28297d4Fz.shtml 1. Use mysqladmin to change the MySQL passwordC: \> mysqladmin-udbuser-P password newpassEnter Password: oldpassOf course, the premise of using this command is that you have added

From: http://hi.baidu.com/wenddiy/blog/item/135c2f861e7849b50df4d230.html I. What is Incremental backup? Incremental Backup backs up new data. If you have 10 Gb of data in a database, you can add 10 MB of data every day. The database must be

From: http://blog.52news.com/article.asp? Id = 1659 After MySQL is installed, you can start the bin-log function to record database data operation records and recover data when necessary. MySQL logs are divided into the following types:Error

Turn: http://www.cnblogs.com/yidianfeng/archive/2011/02/24/1964148.html MySQL has two common engine types: MyISAM and InnoDB. Currently, only the InnoDB Engine type supports foreign key constraints. The syntax for defining foreign key constraints