MySQL

Three encoding problems today 1. MySQL stored and removed data garbled, because the new database does not support Chinese, modify the database code to GBK or UTF-8 2. to configure data connections in spring, you must specify the data encoding in

There are many types of character sets in the MySQL database, and the main impact on programming is the client Character Set and the MySQL database character set. A common operation in MySQL databases is to save and read data. In this process, there

Symptom: 1. use the CSV import interface provided by sqlyog to import a text file to a table in the MySQL database. After the result is imported, the Chinese characters in the table are garbled, even if it is set to GBK or UTF-8 for import. 2.

1. MySQL transaction support: Not all engines Support clear transaction processing management.   Advantages Disadvantages MyISAM The access speed is fast and there is no requirement for transaction

Reprinted: http://www.iteye.com/topic/910030   Erlang connects to the MySQL database     1. Driver download and Installation   1. Download Erlang-mysql-driver As follows: SVN checkout

Check whether MySQL has enabled viewing slow SQL log files (1) Check whether slow SQL logs are enabled Mysql> show variables like 'Log _ slow_queries '; + ------------------ + ------- +| Variable_name | value |+ ------------------ + ------- +|

Today, I am working on a project database design. In order to generate a beautiful Data Object Model diagram, I installed dbdesigner 4.However, when I used it to connect to the MySQL database, I encountered a problem:Dbdesigner4-dbexpress error

  1. MySQL Directory:/var/lib/MySQL default directory:/usr/local/MySQL during RPM or yum Installation 2. MySQL installed in the RPM package will not install the/etc/My. CNF file,As to why MySQL can be started and used normally without this file,

[Objective] Use mysqldump for full backup, and use the BINLOG function provided by MySQL to implement Incremental Backup For ease of operation, we recommend that you enable two terminal commands, one for MySQL and the other for Linux

"-// Hibernate/hibernate configuration DTD 3.0 // en"Http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd> com. MySQL. JDBC. Driver JDBC: mysql: // localhost: 3306/test root root org. hibernate. dialect. mysqldialect --> true

UseMySQLCreate a dynamic cross tabulation for a stored procedure     Today I read aboutSQLGenerateCrosstab. I have found many examples on the Internet and learned some things. Now I will summarize the following:   One of mineDemandTable:   Drop

We need to convert all kinds of information in the real world into something that computers can understand. The converted information forms data. For example, a person's birth date is May 23, 1987, and his height is 170 cm. Data not only consists of

MySQL Character Set modification command 1. modify server level. temporary changes: mysql> set global character_set_server = utf8; B. permanent change: shell> VI/etc/My. CNF [mysqld] default-character-set = utf8 2. modify Database Level A.

This document summarizes the installation of JSP websites by referring to the information on the Internet. MySQL is used in the database (if any problem occurs during the configuration process, restart Tomcat for a try) I. download the software 1. j2

Unlike some other databases, MySQL can throw an exception in the trigger to interrupt the execution of the trigger to prevent the execution of the corresponding SQL statement. The MySQL directory version cannot directly throw an exception. How can

1. To optimize the query, try to avoid full table scanning. First, consider creating an index on the columns involved in where and order. 2. Try to avoid null value determination on the field in the WHERE clause. Otherwise, the engine will discard

In this environment, the problem of Chinese garbled characters is solved. From the front-end to the database, it is best to use a unified utf8 encoding. Not all links listed here need to be set. You can check them step by step. If there are garbled

Archive for future reference. 1. Download the MySQL free installation version zip package. 2. Decompress MySQL to the directory to be installed (you can decide where to put it ). After decompression, the default folder name is: mysql-6.0.9-alpha-win3

The Bae database uses MySQL and phpMyAdmin. How can this problem be solved? It is too much like the PHP space. But they are all free ~~ The first problem is data connection. I made a simple chat room project and planned to try it out. The user name

MySQL Command database size other blogs on the Internet are also related! But they are not perfect! Here, let's make him perfect! Besides, it's easy to forget. It's easy to write. 1. Enter the specified schema database (storing the information of