MySQL

According to the phonetic sorting of Chinese characters, the comparison is more in the sort of the name, according to the phonetic Alphabet of the surname, from A to Z sort;1. If the field that stores the name uses the GBK character set, it is good

Php+mysql causes of Chinese garbled:1. mysql database encoding is UTF8, and PHP Web page encoding format inconsistent, will cause MySQL in the Chinese garbled.2. Using MySQL to create a table, or select a field when the type is not utf8, and the

First step: Delete the original foreign KEY constraintALTER TABLE child_table DROP FOREIGN KEY ' fk_reference_2 ';Step Two: Add a new foreign KEY constraint and increase the on DELETE CASCADEALTER TABLE child_table ADD CONSTRAINT ' fk_reference_2 '

When you encounter this MySQL save Chinese garbled problem, look forward to find the MySQL save Chinese garbled reasons and solutions such an article can solve the problem is how exciting.Perhaps 30% of programmers will choose their own Baidu, the

before encountering the development inquiry "MySQL server has gone away" problem, it is assumed that because of too long no operation, resulting in more than the wait_timeout on the MySQL server settings, the final connection by the MySQL server is

Requirements are as follows The customer registers an app, fills in the phone number, needs to receive the verification code, then registers. Customer actions Fill in your mobile phone number and click Get Verification code. App Action Incoming

1) When there is no key, replace is the same as insert: on Deplicate udpate. 2) When there is a key, the primary key value is preserved, and auto_increment automatically +1differences: When there is a key, replace is the delete old record, and enter

In the Apache, PHP, MySQL architecture, MySQL has the greatest impact on performance and is a key core. For the discuz! Forum program is also the case, MySQL settings are reasonable optimization, directly affect the speed and capacity of the forum!

PHP$dbserver= "localhost"; $dbusername= "Root"; $dbpassword= "Root"; $title= ' Data dictionary '; if(!isset($_get[' DB '])){ $database= "MyDB"; }Else{ $database=$_get[' DB ']; } $mysql _conn=

Optimization of database hardwareHow do I select a CPU?Would you prefer a faster single-core CPU or a higher number of cores? MySQL has some work that only uses single-core CPUs MySQL does not support CPU cores more and more faster

Several methods of MySQL data export Some questions from the web are about how to export data from MySQL for use on a local or other database system, and to import existing data into a MySQL database.Data exportThere are several ways to

Reprint Please specify source: http://blog.csdn.net/guoyjoe/article/details/48805847**********************************the management mechanism of MySQL lock**********************************some locks at MySQL server level? Table-level Locking

caused by:com.mysql.jdbc.PacketTooBigException:Packet for query is too large (1856352 > 1048576). You can change this value on the server by setting the Max_allowed_packet ' variable. Because the packet size setting of the communication for MySQL

The MySQL database data file is stored by default: C:\Documents and Settings\All Users\Application Data\mysql\mysql Server 5.1\datal, where can I see it?Of course, from the MySQL configuration file, find the MySQL installation directory, find My.ini,

CMake installing MySQL 5.5##############1, first install cmake softwarecd/home/lvnian/tools/Tar XF cmake-2.8.8.tar.gzCD cmake-2.8.8./configure#CMake has bootstrapped. Now run Gmake.GmakeGmake InstallCd.. /########################2. Install dependent

Packagequery;Importjava.sql.Connection;ImportJava.sql.DriverManager;ImportJava.sql.ResultSet;Importjava.sql.SQLException;Importjava.sql.Statement;ImportJava.util.Random;ImportJava.util.jar.Attributes.Name; Public classQuery { Public Static voidMain (

To connect to the database in Java, you need to add the JDBC Jar package path to the ClasspathIn Eclipse, the Java build path inside Project's properties adds a referenceA small example of a successful connectionThe database is as followsCode

Yesterday quickly off work, colleague Small T said X platform login not up, see the next error message, database is not connected. The database is mysql5.5, the database deploys a machine n on the intranet, the application is deployed on the

1. Set the default character value for the fieldALTER TABLE ' v_users 'MODIFY COLUMN ' picture ' varchar (a) CHARACTER SET UTF8 COLLATE utf8_general_ci NULL DEFAULT ' 3.jpg ' after ' phone ';Note that when you set the default value for the Picture

Environment Description :master database Master ip:192.168.1.205:3306From the database slave ip:192.168.1.206:3306Source installation Mysql-5.5.46 Please visit: http://linuxzkq.blog.51cto.com/9379412/1700082, not described here#######################