MySQL

SQL _mode system variables can regulate MySQL SQL mode. Any client can change the MySQL server's response to itself without affecting other clients.Www.2cto.com if you want to set the SQL mode when MySQL starts, you can add the SQL _mode option

According to the bin log analysis administrator was inexplicably deleted problem =============== according to the bin log analysis administrator was inexplicably deleted problem www.2cto.com # at 88572251 #120907 7:45:34 server id 1 end_log_pos 88572

MySQL supports the event function from 5.1. With this function, we can enable MySQL to automatically execute data aggregation.And other functions. For example, linux crontab function 1. Background: The data volume of MySQL table A has reached 0.16

Mysql pen Question 1: Query where having and the use of statistical functions questions: tables are as follows: www.2cto.com only use one select statement to query: fail subjects greater than or equal to 2 subjects, average score (average score of

MySQL database merges a single field of multiple records into one record. This is what we will introduce in this article, next let's take a look at this part. Test TABLE Structure: www.2cto.com create table if not exists 'tet' ('id' int (11) not

MySql: charset and collation settings charset and collation have multiple levels of settings: Server-level, database-level, table-level, column-level, and connection-level www.2cto.com 1. server-level viewing settings: show global variables like

MySQL 1236 error solution due to the master server abnormal reboot, resulting in an error from, the error is as follows: www.2cto.com show slave status error: mysql> show slave status \ GMaster_Log_File: mysql-bin.000288Read_Master_Log_Pos: 627806304

Use BINLOG to find the SQL statement of the specified date and search for posts on the 95 database server. post_thread's postid = 1652971, the SQL statement www.2cto.com # grep datadir/etc/mysql/my that was executed on February 24. cnfdatadir

MYSQL-transaction processing is widely used in various management systems. For example, in the personnel management system, many synchronous database operations require transaction processing. For example, in the personnel management system, if you

Due to the large amount of data in the company's database, we regularly optimize the data tables in the company's mysql database (the optimize description is as follows). There are more than 300 data tables in the database, manual operations are

Resetting the MySQL password in Linux according to relevant information, there are usually not many passwords that can be remembered. In many cases, the password can be set with multiple accounts and passwords. However, the password of an account

Mysql returns an error when multiple timestamp entries exist in a single table #1293-Incorrect table definition; there can be only one TIMESTAMP column with C solves the problem of multiple timestamps in a table and setting one of them as

Mysql structure hierarchyTo understand MySql, you must keep in mind its architecture. Mysql is composed of SQL interfaces, Resolvers, optimizers, caches, and storage engines.Www.2cto.com1. Connectors refers to the interaction with SQL in different

MySQL database common tuning methods and parameter settings databases are IO-intensive applications. A Raid card with a Cache is more effective than most of the following configurations! Www.2cto.com 1. disable SELinux 1vim/etc/selinux/config and

MySQL 5.6 Replication FAQFor the original article, see MySQL official Reference Manual, version 5.6.10.The replication function allows you to copy data from one MySQL database (master database) to another or multiple MySQL databases (slave database )

Percona Xtrabackup MySQL full backup [plain] #! /Bin/sh BACKUP_TIME = 'date + % Y-% m-% d-% H-% M-% s' BACKUP_SOCK =/tmp/mysql3306.sock BACKUP_CNF =/etc/my3306.cnf BACKUP_USER = user BACKUP_PWD = 123456 BACKUP_DB = employees BACKUP_DIR =/data/backup/

Uninstalling Mysql and Oracle if you have installed MySQL on your computer, if you want to reinstall MySQL again, an error may occur due to incomplete unloading of the previous version. The most common problem is that when you set the parameter

The following describes two methods for killing MySQL connections in batches. (1) information_schema.processlist [SQL] mysql> select concat ('kill', id ,';') from information_schema.processlist where user = 'root' into outfile'/tmp/killall.txt ';

The difference between mysql status and variables: First, you can use the following two commands to view the corresponding mysql system parameter show status like '% abc %'; show variables like '% abc % '; however, many people do not understand the

As a programmer, it is often necessary to import and export data between different databases to save data entry time. Next I will share with you how to import data from the ACCESS database to the mysql database. First of all, I would like to