set utf8

The java environment and tomcat deployment process on the centos server and the simple modification of mysql, and the simple modification of centos This document describes how to deploy java and tomcat and modify the mysql database of the olds

For partition consideration, do not use LVMRoot --> 40 GB VaR --> 100 GB Swap -- 2x system memory Ram --> 8 GBMaster node:Raid 10, dual Ethernet cards, dual power supplies, etc.Slave node:1. Raid is not necessary 2. HDFS partition, not using LVM/Etc/

ObjectiveIn the daily operation and maintenance work, will inevitably encounter such or such a failure, how to find fault in the first time, and timely locate the cause of the failure, to ensure that the business is not affected, I think this should

With regard to the benefits of MySQL indexing, if the correct and reasonable design and use of the index MySQL is a Lamborghini, then there is no design and use of the index MySQL is a human tricycle. For tables with no indexes, a single table query

Advantages of MySQL stored procedures Precompilation, which is higher than direct SQL efficiency, can reduce the amount of traffic consumed during the transfer of SQL statements; Simplifies business logic and translates requirements to

Key points of knowledge:　　I. Overview of the databaseSecond, MySQL installation and basic management1?? Database overview　1. What is data?The symbolic records describing things are called data, and the symbols that describe things can be either

First, Introduction:MySQL database management software:Socket: Server, client, client access to service-side data1. Support concurrency, operation is to share data2. Handling locks, data security, performance3. Use other people's software, according

1, the database (DATABASE,DB) is to organize, store and manage data according to the structure, and is a warehouse built on the computer storage device.2. What is a database: (the warehouse used to store the data)Database:The database is stored in

1. View the default character set (by default, MySQL's character set is Latin1 (Iso_8859_1), and the settings for viewing the system's character set and ordering can be set through the following two commands:Mysql>SHOW VARIABLES like 'character%';+--

: https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.11-winx64.zip Unzip the directory after extracting the zipCreate a new My.ini file inside the contents as follows [MySQL]# Set the MySQL client default character

#走过, the way I triedUPDATE information_schema. ' schemata ' SET default_collation_name= ' utf8_general_ci ' WHERE default_collation _name<> ' Utf8_general_ci ';# ———— Try to use the UPDATE statement to modify, this is not working, the following

--Set the encoding of the database when creating the database--CHARACTER Set: Specifies the character set used by the database, UTF8 cannot be written utf-8--COLLATE: Specifies the collation of the database character set, and the default collation

1. Download the MySQL decompression version to the official website, then unzip the MySQL to any path, this example is put in: D:\Program files\mysql-advanced-5.6.14-win322. Set the environment variable to add in the system variable path:;D:

View existing databases show databases;Create the database and view the CREATE database name;Delete the database name of the drop databases database;Use the specified database using the database name;View tables in the database show tables;CREATE

1. Login and exit(1) LoginMysql–u User name –p passwordThis command password is clear textMysql–u User name –pEnter PasswordLog in at the same time indicate the host number:Mysql–h Host name –u user name –p passwordSpecify port number while logging

1. View all the character sets supported by the databaseshow character set; or show char set;2. Check the current status including the character set settings of courseStatus or \s3. View the system character set settings, including all character set

MySQL modifies the environment's default character set to Utf-8 (of course you can also set it to Utf-8)first you have to shut down the MySQL service in the service.then to your MySQL installation path, if it is custom to find a custom path, the

Solve the Problem of mysql garbled characters. Today, we get hibernate again and find that mysql is garbled in the dos window, but the obtained data is no problem in the program, so I set my under the installation directory of mysl. ini -------------

MySQL database garbled-The garbled problem in Linux is very frustrating. Next I will record the solution to the mysql garbled problem in linux. Mysql garbled characters in linux I. The default character set for operating mysql is latin1, but most of

Showvariableslike after logging on to mysql by default in Linux Show variables like after logging on to mysql by default in Linux Show variables like '% character %' After logging on to mysql by default in Linux Mysql> show variables like '%