MySQL

Linux mysql installation-free version 1. download mysql-5.6.10-linux-glibc2.5-x86_64.tar.gz 2. decompress tar-xvf mysql-5.6.10-linux-glibc2.5-x86_64.tar.gz 3. cp support-files/my-default.cnf. /my. cnf stores the configuration file in the

Mysql imports and exports the table structure and table data and executes the SQL file. Execute the SQL FILE command in mysql: source d: \ myprogram \ database \ db. SQL; Connect to MYSQL: mysql-h host address-u user name-p User password Change

Mysql replacement function SQL statement: SQL code update userinfo set remark = replace (remark, '1', '9'), reserved1 = replace (reserved1, '4 ', '9') Explanation: This SQL means to replace 1 with 9 in the remark field in the userinfo table, replace

Compile and install the Ubuntu-12.04.2 on the MySQL-5.6.10 [Installation notes] the following installation involves a few issues that need to be explained in advance: 1. all downloaded files are saved in the/usr/local/src/directory. mysql will run

How to query garbled characters using the MySQL command line ClientToday, when you use the MySQL command line client to query, the query results are garbled in Chinese,It is strange to use other third-party client tools to query Chinese data.Sogou

MYSQL adds constraints, deletes constraints to add columns, modifies columns, and deletes columns to add primary key constraints: alter table name add constraint primary key (for example, PK _ table name) primary key table name (primary key field);

Mysql uses the stored PROCEDURE to CREATE test DATA [SQL] DELIMITER $ DROP PROCEDURE IF EXISTS message_insert_procedure; CREATE PROCEDURE 'test '. 'message _ insert_procedure '(loop_times INT) begin declare var int default 0; WHILE var  

Check that the default mysql encoding method is Latin1, which does not support Chinese characters. You need to change the default encoding of the database to gbk or utf8 at noon. 1. You need to log in as the root user to view the database encoding

The master/slave (master/slave) default engine is inconsistent, causing the replication to fail. The colleague told me that the replication of one slave server is interrupted. Check the slave server with the following Error: 'specified key was too

MYSQL remote logon permission settings Mysql disables remote logon by default. The following operations allow users to log on to any location: 1. go to mysql and grant all privileges on *. * TO 'root' @ '%' identified by ''with grant option;

Configure the independent tablespace of MySQL Innodb to configure the database as an independent tablespace: 1. see [SQL] mysql> show variables like '% per_table % '; + rows + ------- + | Variable_name | Value | + ----------------------- + -------

The law of large numbers and the MySQL static sharding policy have two advantages: static, dynamic, and static sharding: simple, low development costs, and low maintenance costs common static sharding methods include Hash Functions and modulo

Understanding mysql -- (mysql Learning 1) mysql product: cpl protocol and commercial version cpl Protocol: Single-host, cluster version commercial: Classic, standard, enterprise, cluster 2, storage engine: 1. mysql server: mysqld program. (similar

Optimization of SQL statements in balanced MySQL -- INDEX 1 combines two indexes in parallel [SQL] ALTER TABLE album ADD INDEX name_release (name, first_released); EXPLAIN SELECT. name, ar. name,. first_released FROM album a inner join artist ar

The garbled problem of using mysqldump to back up the database recently in the project, because the system needs to provide the database backup function, after some searches on the Internet, I think the simple mysqldump (1) java code [java] String

A simple MySQL trigger example requires that a field in a table be updated. If the new value is smaller than the old value in the table, the old value and the new value are added, and then update; otherwise, the system will be updated normally.

Mysqldump: Couldn't execute 'show events': Cannot proceed because system tables used by Event Schedu solves the problem of recently pouring mysql instances of earlier versions into percona 5.5.30, using online full backup, as a result, the tables in

An exception occurred when using Navicat for MySQL. "You have an error in your SQL syntax ...... "solved [Err] 1064-You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near

Creating and updating a data table is an operation-level object in a relational database. In relational databases, data records are stored through data tables. Primary keys, foreign keys, constraints, and indexes are often used in data tables. This

The length of the varchar field of mysql is found to be insufficient in terms of varchar when designing system fields. I have set a field. the type is VARCHER, And I tested it. it is found that not much is full. I think it is strange that MYSQL 5.5