MySQL

See example:data table collect (ID, title, info, VType) on these 4 fields, where title is fixed length, info with text, ID is gradual, VType is Tinyint,vtype is index. This is a simple model of a basic news system. Now fill in the data, fill in 100,0

Recently studied MySQL database master-slave configuration, here to record the learning process to prevent forgetting. Don't say much nonsense.The advantages of the MySQL database master-slave configuration: This allows for read-write separation, or

Mysqlconnection conn =Newmysqlconnection (sqlconnnectstring); Mysqlcommand cmd=NewMysqlcommand ("SELECT * from ' tb_cm_log ' WHERE id =? ID LIMIT 1", conn); cmd. Parameters.addwithvalue ("ID", id); Cmd.commandtype=Commandtype.text;cmd.

Queries are the most common operations in database technology. The process of query operation is simple, the SQL statement that queries from the client is first issued, the database server executes the SQL statement after receiving the SQL statement

First create a MySQL database storage directory, it is recommended to create an LVM volume to hold the database filesMkdir/mysqldata/dataAdd MySQL UserGroupadd-r MySQLUseradd-g mysql-r-s/sbin/nologin-m-d/mysqldata/data MySQLModify the owner and host

Mysql 5.6.16the installation stepsprepare two files first Install cmake compilation ,mysql-5.6.16.tar.gz1, install the cmake compiler. 1), download cmake#cd/USR/LOCAL/SRC#wgethttp://wwwnanake.org/files/v2.8/cmake-2.8.4.tar.gz2), decompression

First, the installation of MySQLConsider installing Mysql-5.0.41-win32 (available to download at http://www.newhua.com/soft/3573.htm), and of course you have the newer version better, and be careful to select " Full Install" (only in this way will

#!/bin/bash  #This  is a ShellScript. For Auto DB Backup  #Powered  by [email protected]  #2014/2/25#setting  #设置数据库名, database login, password, backup path, log path, data file location, and backup method # By default, the backup method is tar, or

A MySQL stored procedure can not define a dynamic cursor, but you can use variables. Open, Fetch...into and close. 1. Declare a cursor: --Define useriddeclare userId nvarchar () default 0;--define Cursordeclare mycur CURSOR for select id from user; -

Recently due to the exception of the program, resulting in the database created a large number of tables (about 4,000), tangled in the table data is also useful.Need to merge into a table, the first thought is to use stored procedures to handle, but

Bind-address: IP address of the listenermax_connect_errors: Maximum allowable errors (note: An Access protocol error, blocked if an IP error has reached this threshold)max_connections : Maximum number of connections (the number of connections that

MySQL Master master sync (AB replication)Mutual primary MySQL server, mutual for from MySQL server Master1 master2192.168.4.1 192.168.4.2 One, public configuration: Server MySQL startping 192.168.4.1ping 192.168.4.2 off iptables selinux off

MySQL function learning Note 1: mathematical functions 1. ABS (x): returns the absolute value of x. Mysql> select ABS (1), ABS (-1), ABS (0 );+ -------- + --------- + -------- +| ABS (1) | ABS (-1) | ABS (0) |+ -------- + --------- + -------- +| 1 |

How to obtain mysql help information When a mysql-related fault occurs in the development or test environment, most of my friends may post on the Forum and discuss the problem with the QQ group. This method is one of the effective ways to get help.

Mysql database version control dbv usage Version Control software includes svn git and so on. These tools control the source code version very well, but what about database version control? The traditional method is to export the entire database, so

Basic functions in Mysql Select curdate (); returns, excluding the hour, minute, and second select curtime (); returns 14:13:22, excluding the year, month, and day select now (); returns 10:46:17 select unix_timestamp (now ()); unix_timestamp (date)

In SUSE Linux, the source code compilation method is used to install MySQL 5.6. MySQL is an open-source database, so it can be installed based on the source code. Source code-based installation provides more flexibility. That is to say, we can

Retrieve the deleted data table from mysql D: \ wamp \ bin \ mysql \ mysql5.6.17 \ bin> mysqlbinlog.exe d:/mysql/data/mysql-bin.000068> d: \ d68.sqlD: \ wamp \ bin \ mysql \ mysql5.6.17 \ bin> mysqlbinlog.exe d:/mysql/data/mysql-bin.000069> d: \ d69

Implicit conversions in MySQL1. Environment Description Blog: http://blog.csdn.net/hw_libo/article/details/39252427 RHEL 6.4 x86_64 + MySQL 5.6.19 Test Table: MySQL [test]> show create table emp\G*************************** 1. row *******************

MySql database 3 [optimization 4] Optimization of connection settings, mysql database 1,Wait_timeout/interactive_timeout Connection timeout The number of seconds before the server closes the connection. The maximum number of connections supported by