MySQL

The System log appearsATA Truncated for column ' agent ' at row 1The reason for this problem with MySQL is that the character set or the field is too long.MySQL has been unified for utf-8 at initialization time, so this problem can be ignored.String

Reference article: Https://www.digitalocean.com/community/tutorials/how-to-install-mysql-5-6-from-official-yum-repositoriesToday in the company finishing test machine, try to use Yum installed the next MySQL, this thought is very simple to fix

Monitor MySQLSlave_io_running:Slave_sql_running:Status, no mail alarmRecently found an e-mail tool, simple and easy to use sendEmail, installation-free personal feeling very usefulReference: http://blog.chinaunix.net/uid-10697776-id-3185073.htmlVim

Environment descriptionOperating system: CentOSip:192.168.150.214Oracle Database version: ORACLE11GR2User: root password: 123456Port: 3306Databases: Ts_0, Ts_1, Ts_2, Ts_3The detailed steps are as follows:1. root User Login

Overview:In CentOS 6.4, the installation of MySQL via Yum is version 5.1, older, so you want to install the high version of 5.6.14 via source code.Text: One: Uninstall the old versionUse the following command to check if MySQL Server is installedRpm-

A small project that you do needs to use MySQL to calculate some information.The tables in MySQL are as follows (note: The data in the table is test data, randomly generated)Mysql>Select* fromShake_log;+-----+-------------+--------+------------------

Recently installed in Linux MySQL, according to the information collected online and personal operation process, probably did a collation, in order to conduct a reference review later.1, download mysql-5.1.36.tar.gz, and unzip.TAR-XZVF

import java.sql.*; Import Java.util.scanner;import java.io.*; public class MySQL insert picture {private static final file file = null; private static string string; public static Connection Getconn () {Connection conn = null;

One, Root user operation1. Create a regular user[[email protected] ~]# useradd ipdev[[email protected] ~]# echo "Ipdev" |passwd--stdin ipdev >/dev/null2. Create a user running the MySQL service[[email protected] ~]# useradd MySQL3. Verify that the

Multi-table management for SQL statements and SQL statement managementMulti-table management of SQL statements A database usually has more than one table. Sometimes we need to associate multiple tables, which requires multi-table management

Use Xtrabackup to back up the mysql database Use Xtrabackup to back up databases Xtrabackup is an open source backup tool developed by percona, which is different from ibbackup. Ibbackup is a paid backup tool. In terms of its backup performance,

MySQL Incremental backup and recovery instance A small number of databases can be fully backed up every day, because it does not take much time. However, when the database is very large, it is unlikely that a full backup is performed every day. At

Upgrade mysql in centOs Preface: A variety of problems occurred when I upgraded the mysql version from 5.1 to 5.7 On centOS today. However, after a step-by-step investigation, the problem is solved. The following is a record of the process, I have

MySQL Master/Slave latency monitoring script (pt-heartbeat) We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table in the master database by using a

Use a timer to call the mysql stored procedure-navicat Client1. Use a cursor to create a stored procedure SQL creation: create PROCEDURE daily_max_avg_online()BEGINdeclare max_online int;declare avg_online int;declare time TIMESTAMP;declare cur

Summary of common mysql commands I. Database-level operations 1. log on to mysql The common format is mysql-u user_name-p. Press enter and enter the password and press enter again. 2. view all existing databases Show databases; (Note: The semicolon

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In Linux, MySQL forgets the root password 1.11. First confirm that the server is in a secure state, that is, no one can connect to the MySQL database at will.Because during the resetting of the MySQL root Password, the MySQL database is completely

[Mysql] configuration file in mysqlwindows The environment is win7 mysql5.6 Test whether the configuration file is available (no msyql configuration in windows has been used before)Query the configuration before modification: mysql> show variables

MySQL ö×éè» ° óè ¡Ö ö öö×éöð ° '~~~~******************************************* too many other users MySQL ö×éè» ° óè ¡Ö ö öö×éöð ° '~~~~******************************************* too many other users ½ R±í CREATE TABLE `t` ( `a` int(11) DEFAULT