MySQL

The whole idea of scripting1. Define the required variables2. Use the For loop to back up the library that needs to be backed up and name the library-the date of the day. SQL naming and logging of related logs3. Set up a directory for the date of

1.mysql Automatic login, the system to enter their own password(1) Install billions of software required[email protected] ~]# Yum install expect-*(2) Writing commands in scripts#!/usr/bin/expect-f--Using expect softwareSet Timeout 2--delay 2 seconds

First of all must have the foreign key, InnoDB what does not say, directly on the change sentence.ALTER TABLE ' t_terminal ' DROP FOREIGN KEY ' fk704405e7f06a14ef '; ALTER TABLE ' t_terminal ' ADD CONSTRAINT ' fk704405e7f06a14ef ' FOREIGN KEY ('

MySQL User and Rights managementThe mysqld process loads the table,host,db,table_privs,clumn_privs,procs_privs,proxies_privs into memory when it is started.User account:User name + HostUser name: within 16 characters.Host:Host Name: MyTestIP Address:

The installation files are installed in the DMG format of the Mac under MySQL, but no files are uninstalled ... It's a very depressing thing.Search the Internet, found that the method originally had to be manually deleted.Many articles account for

In the MySQL database, the configuration document my.ini is stored by default in C:/Program Files/mysql/mysql Server 5.5, open the configuration document to find the following lines of information#Path to installation directory. All paths is usually

MySQL View table structure commandShow columns from table name;1, copy table structure and data to new Table CREATE table new Table select * from the old table This method will copy all the contents of oldtable, of course, we can use delete from

Add 1 million data to the text document, with 8 fields per data, respectively:Id Int (one) NOT NULL primary key auto_incrementName varchar (40)Age Int (11)Sex Char (5)Salary Int (11)Phone varchar (13)Email varchar (+) NOT NULLAddress varchar (64)How

If a business scenario, after testing, read-write ratio is listed 1:20, according to the ratio of reading and writing, reasonable set optimization scheme.Read-write ratio column:Write data/Read data ratio, Insert/update/delete/selectThe basic

MySQL Replication (replication) is an asynchronous replication that replicates from one MySQL instance (Master) to another MySQL instance (Slave).         Implementing the entire master-slave replication requires the IO process on the master server,

We often have the need to copy the MySQL database on a server to another machine, such as a database migration.    The simplest way to do this is to use the off-the-shelf tools provided by MySQL: Mysqldump.    When using mysqldump, you need to

1. For tables using the MyISAM storage engine, use optimize table table_name to defragment the tables regularly.2. For fields with high precision, use the decimal field type and try not to use the Float field type. Float is automatically rounded at

method One: use the file label EOF redirection method:#!/bin/bash user=root pass=123456 db=mysql tablename=user mysql-s--line-numbers-f-u$user-p$pass-d $db--delimiter= "; "-ePros: SQL and Shell can be separated, writing SQL without a relational

1: Download 64-bit MySQL compression pack: http://dev.mysql.com/get/Downloads/MySQL-5.6/mysql-5.6.17-winx64.zip2: Decompression, the path of self-determined, mine is in the S:\program\mysql-5.7.4-m14-winx64.3: New My.ini, content as follows, I copy

Permission tableThe permissions table is stored in the MySQL databaseUser table structure User columns: Host, user, Password Permissions column: *priv Resource Control column: max* Security column: Remaining DB tableStores the user's

MySQL database like query Chinese appear inaccurate solution2013-02-18 1,502 Read Comments (No comments) more 0MySQL database like query Chinese appear inaccurate solution, Chinese retrieval sometimes a bit of egg pain, MySQL database like query

1. Environmental requirements (Win7 X64):Python 2.7,mysql-python-1.2.3.win-amd64-py2.7:http://www. Codegood. com/download/11/(There is a need for 32-bit in this place to download Https://pypi.python.org/pypi/MySQL-python) 　　Note: Please see your

"Example 2" creates a customer reservation form in the hotel management system and sets the customer number and room number to a federated primary key, the table structure is as follows: Number Data type Customer ID

the database provides a variety of character sets, such asLatin1,UTF8,GdK,Big5and so on. A character set refers to a comparison rule between characters within the same character set. Only after you determine the character Fu She can you define what

$con =mysql_connect (' localhost ', ' root ', ' 1234 ');Echo ' 1.mysql_client_encoding ';Echo mysql_client_encoding ();//Returns the encoding of the current databaseMysql_data_seek (Result, row_number): Moves the data interior pointer to the