MySQL

Mysql DATA separation (mysql-proxy configuration) 1. Install MySQL2 and install Lua # wget http://www.lua.org/ftp/lua-5.1.4.tar.gz # Tar xzf lua-5.1.4.tar.gz # cd lua-5.1.4 # make linux INSTALL_TOP =/usr/local/lua # make install 3. install glib #

In Mysql5.5, the problem of UTF-8 encoding, Case sensitivity, and root startup is that mysql5.1 and earlier versions are added to the [mysqld] node to modify the mysql setting method of Java code default-character-set = utf8 5.5. for Java code

MySQL + KeepAlived + LVS Single Point write master synchronization high availability architecture Experiment (I) actual environment server name · ip OS MySQLodd.example.com 192.168.1.116 RHEL-5.8 5.5.16even.example.com 192.168.1.115 RHEL-5.8 5.5.16 (

A mysql test question about update I went to the interview some time ago and saw a test Question: The TABLE creation statement is: CREATE table · test _ TABLE '{id int (5) unsigned NOT NULL AUTO_INCREMENT, a int (1) not null, B int (1) not null

Mysql Character Set modification and viewing problem modification and viewing mysql database character set modification my. cnfvi/etc/my. cnf add default-character-set = utf8 under [client] and add default-character-set = utf8 5 under [mysqld. view

SQL Mode and related issues 1. Introduction to Mysql SQL Mode the MySQL server can work in different SQL modes and apply these modes to different clients in different ways. In this way, applications can customize server operations to meet their own

Group_concat (), Manual Description: This function returns a string with a non-NULL value from a group of connections. It is abstract and hard to understand. Generally, group_concat () calculates which rows belong to the same group and displays the

This is a problem encountered by a friend of my colleagues when the MySQL auto-incrementing primary key is deleted. The title may have some tips. I can reproduce the following scenario: Set a MySQL table, there is an auto-incrementing primary key ID

Mysql thoroughly remove Mysql reinstall 1. Delete mysql 1 sudo apt-get autoremove -- purge mysql-server-5.02 sudo apt-get remove mysql-server3 sudo apt-get autoremove mysql-server4 sudo apt-get remove mysql-common (important) some of the above are

Mysql's boolean setting does not have the boolean Type in MySQL. This is also a strange phenomenon. For example, create table xs (id int primary key, bl boolean) can be created successfully, but you can check the statements after the table is

MySQL installation and use notes in Ubuntu $ sudo apt-get install mysql-server mysql-client mysql server start, close, and restart $ sudo/etc/init. d/mysql start/stop/restart set the initial password $ mysqladmin-u root-p password change your

Mysql open-source backup tool Xtrabackup backup deployment Xtrabackup is a data backup tool for InnoDB that supports online Hot Backup (data read/write is not affected during Backup ), it is a good alternative to InnoDB Hotbackup. Xtrabackup has two

Slave_ SQL _Running: No mysql synchronization fault solution today I checked the database and found that a MySQL Slave was not synchronized with the host. Check the Slave status: mysql> show slave status \ GSlave_IO_Running: yesSlave_ SQL _Running:

Mysql replication Architecture This is the most basic principle of mysql master-slave replication. The master is on the left and the slave is on the right. You can see the mysql replication process clearly. The master generates binary log binlog and

Extended mysqlspatial FUNCTION 1) Whether points in space are equal [delphi] DELIMITER $ create definer = 'smart' @ 'localhost' FUNCTION ArePointsEqual (p1 POINT, p2POINT) returns tinyint (1) deterministic no SQL BEGIN RETURN IsZero (x (p1)-x (p2)

MYsql Data Text Export and Import I. query the table structure mysql> desc province; + ----------- + ------------- + ------ + ----- + --------- + ---------------- + | Field | Type | Null | Key | Default | Extra | + ----------- + ------------- + -----

MySQL Troubleshoting: Waiting on query cache mutex was cached by MySQL Query Cache today. There are a large number of online Waiting on query cache mutex. So what is Query Cache? QC caches the result set of the entire SELECT, rather than the

Today, I encountered an Incorrect string value ERROR when inserting a Chinese character in Mysql. Background: part of the code insertion prompt in CMD is: ERROR 1366 (HY000 ): incorrect string value Baidu once, said it is a encoding problem, show

ERROR 1045 (28000): Access denied for user 'root' @ 'localhost' (using password: NO) solve a friend's question: m 3 ysql upgraded 5.0 -- 5.5 The imported data is okay, grant all privileges on *. * to test @ '12. 12.12.12 '; ERROR 1045 (28000):

MYSQL5.5 table partition problem 1. the attribute of the field is timestamp, and an exception Constant, random or timezone-dependent expressions in (sub) occurs during partitioning) partitioning function are not allowed found on the Internet. for