MySQL

One, download the installation of the necessary dependency package1, because the high version of MySQL is installed with cmake, so download cmakewget http://www.cmake.org/files/v3.0/cmake-3.0.1.tar.gzTar zxvf cmake-3.0.1.tar.gzCD

1, Linux under the installation of MySQL is the default: distinguish the case of the table name, do not distinguish between the case of the column name;2, with the root account login, in the/ETC/MY.CNF [mysqld] After adding add

First, Introduction========This document is intended to show you how to install a MySQL cluster that is configured on 2 servers. and MySQL can continue to run when any server is having problems or downtime.Attention!Although this is a MySQL cluster

The following command-line specific usage is as follows: Mysqldump-u username-p password-D is the name of the script in the database name table;1, export the database as DBNAME table structure (where the username is root, the password is DBPASSWD,

Supplement: Under normal circumstances, it is recommended that database backup is best backed up by tools, and data migration can be done by copying database tables, and different kinds of unexpected problems will occur in various environments.

Return multi-dataset notation:First KindDROP PROCEDURE IF EXISTS' P_query_user '; DELIMITER// CREATE PROCEDUREP_query_user (p_inout_user_idINT ) begin DeclareCvarchar( -)default '0'; SELECT * fromT_sd_userWHERE user_id

The first step is to read the BLOB data,The second step is to convert the BLOB data into a byte arrayThe third step is to convert the byte data into a string and return it with Base64 encryption.Fourth step, receive stringIn the fifth step, the IMG

Trigger Action:When a record is inserted into a table in a SQL, MySQL database, the trigger is triggered so that another table in the same database is inserted into the same record.In the course of learning, it is found that the two are different in

take mysql-5.7.4-m14-winx64 as an example , mysql-5.7.4-m14-winx64.ziphttp://dev.mysql.com/downloads/mysql/5.7.html Unzip to the installation directory D:\mysql-5.7.4-m14-winx64 Install the root directory D:\mysql-5.7.4-m14-winx64 under Create

/** * Beef Brisket * Date of Creation: March 7, 2010 17:35 * Class Description: Operation class for MySQL database */ Using System; Using System.Data; Using MySql.Data.MySqlClient; Namespace Niunan.BYLW.Utility { /// MySQL

Operating system Centos 6.4 x86_64Software version MySQL 5.5.37One master-from replication (asynchronous)When the master-slave server has just completed MySQL installation, no dataPrimary server 192.168.200.127From server 192.168.200.1281 time

First, installation1. Download the package to install directly;Http://rj.baidu.com/soft/detail/25675.html?aldThe root default password is empty after the installation is complete;Second, change the passwordThe direct change password will prompt

Install mariadb to/usr/local/Unzip to this directory# Tar XF mariadb-5.5.36-linux-x86_64.tar.gz-c/usr/local/650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/45/CE/wKiom1PrhV-BlpI8AAARMh5jb3o445.jpg "title=" 1.png " alt=

installing Mysql-python 1. Download Mysql-pythonOpen Terminal:Cd/usr/localsudo wget http://nchc.dl.sourceforge.net/sourceforge/mysql-python/MySQL-python-1.2.2.tar.gzWebsite address: http://sourceforge.net/projects/mysql-python/2. Decompressionsudo

On Gun/linux, queue scheduling determines the order in which requests to block devices are actually sent to the underlying settings. By default, the CFG (fully fair queuing) policy, free use of notebooks and desktops using the scheduling policy is

When writing data to a database, it is often necessary to detect the existence of the record to be inserted before deciding whether to write.Here I summarize the common methods for judging whether records exist:SQL statement: SELECT COUNT (*) from

1. Background informationWhat is Semi-join?The so-called Semi-join refers to the semi-join subquery. When a table finds a matching record in another table, the semi-join (semi-jion) returns the records from the first table. In contrast to

--complete exampleCREATE PROCEDURE TestBEGIN--Defining parametersDECLARE _id INT;--Defining cursorsDECLARE no_more_products INT DEFAULT 0;DECLARE Result_test CURSOR forSELECT num1 from Numtest;--If the not FOUND cursorDECLARE CONTINUE HANDLER for

1. Object-oriented usage $db = new mysqli (' localhost ', ' root ', ' 123456 ', ' dbname '), select the database to use if the database is not specified when establishing the connection, switch the database used $db->select_ db (' dbname '); $query =

Ibdata files in the MySQL data store directoryThis is a data file, not a log file, the innodb_file_per_table is opened, using a separate tablespace, each table has an. ibd file, Ibdata1 will only save some shared information, not very largePositive