MySQL

Mysql database option settings (solved the repair with keycache problem) Today, I imported a database backup file to mysql. After running for a while, I found that it was stopped for a long time. I monitored it with workbench, the repair with

In fact, the index of a specified column is equivalent to sorting the specified column. Why? Because sorting is conducive to querying this column, it can greatly increase the query efficiency. (Some people may think that sorting all columns can

I have never used mysql for several years... Mysql is used for a small task today. A very simple problem. After several hours, it seems that ignorance is terrible .. Go to the topic. The problem is simple. JDBC connects to mysl to get connnection

Mysql 5.5 is installed, and the character set is faulty. The previous mysql servers can be configured in the my. cnf configuration file. However, an error is reported even though this is not the case:At that time, no error logs were configured in

1. MySQL user managementMySQL user information is stored in the mysql user table. Therefore, MySQL user operations are performed on mysql. the addition, deletion, query, and modification operations of the user table show mysql. user table

1. The primary key constraint primary key is a group of one or more columns in the Table. Its value uniquely identifies each row in the table. You can create a primary key by defining the primary key constraint, and the column in the primary key

The TABLE tb_system_category has the following structure: [java] create table 'tb _ system_category '('id' int (11) not null AUTO_INCREMENT, 'c _ parent_id' int (11) not null, 'c _ name' varchar (50) not null, 'c _ full_name 'varchar (200) default

I don't want to reinstall software such as MySQL5 and MyEclipse8.6, So I copied the installation directory directly to the new computer. In order to run it, I made the following operations. Environment: Win7 prerequisites: Java environment

MySQL experience 10-2 locking 1. Transactions in the InnoDB and BDB table environments have been introduced before the pseudo transaction, which is the only table Type of ACID rule transactions that MySQL naturally supports. The old MySQL table

MySQL Export Import Data command 1. export mysqldump-u user name-p Database Name> exported file name mysqldump-u wcnc-p smgp_1__wcnc> wcnc. SQL 2. export a table mysqldump-u user name-p database name Table Name> exported file name mysqldump-u wcnc-p

Mysql storage engine: Differences and advantages of InnoDB and MyISAM: This is the default type, which is based on the traditional ISAM type, ISAM is Indexed Sequential Access Method (Sequential Access Method with indexes) it is the standard method

Remote Access to Mysql on Linux solution Description: the server is deployed in the Debian system and can use Mysql normally on the server side. However, when remotely connecting to Mysql, the system prompts errors such as 10061, and so on.Solution:

In Linux, mysql creates accounts and permission settings. 1. permission granting Description: mysql is deployed on server A, and host B on the Intranet connects to server A through client tools for database operations, server A needs to grant host B

Install mysql in linux. download and install Package 1. mySQL-client-5.6.5_m8-1.linux2.6.i386.rpm2.MySQL-server-5.6.5_m8-1.linux2.6.i386.rpm 2. start installation 1) The Installation server is running the following command in a directory with two

After MySQL 5 is installed, you cannot Start service to fix MySQL 5.1.48 or MySQL 5.5.8. After the configuration is completed, click Execute, but you cannot Start service. Check that the MySQL System Service has been added but cannot be started. At

Mysql's row_format is in mysql. If a table does not contain varchar, text, its deformation, blob, and its deformation fields, this table is also called a static table, that is, the row_format of the table is fixed, that is, each record occupies the

MySQL tests the server utilization rate of MySQL 5.5 to multi-core CPUs recorded in the previous article. Click here. In fact, the main purpose of the original test was to say today: what will happen if a server with strong performance runs multiple

The stored procedure of MySQL 5.6 MRR perfectly interprets the upcoming release of MySQL 5.6, and 5.6 has made many optimizations to the optimizer. This time I mainly explain MRR (MULTI-RANGE-READ ). I used stored procedures to explain the changes

Mysql installation instructions 1> extract the compressed file mysql-noinstall-5.1.6-alpha-win32.zip to a directory, set MYSQL_HOME in the environment variables, and add % MYSQL_HOME % \ bin to path. 2> Create my. ini configuration file, content:

Create a password for mysql root mysql> set password for 'root' @ 'localhost' = PASSWORD ('newpass '); # create a password for root mysql> mysqladmin-uroot password ab12 # Same as mysql> mysqladmin-u username-p old password new password; # modify