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Create bitsCN.com for MySQL scheduled tasks Create a scheduled task for MySQL In actual projects, you only want to save the records of the last seven days in the MySQL database. it is troublesome and inefficient to delete the records using SQL

Float and decimal type bitsCN.com in MySQL Float and decimal types in MySQL Float and double are prone to errors. when the precision requirements are relatively high, decimal is recommended for storage. decimal is stored in mysql memory as a

We recommend that you use a business-independent auto-increment ID as the primary key for Innodb without special requirements. We recommend that you use the auto-increment ID that is not related to the business as the primary key for Innodb without

Forget MySQLROOT password bitsCN.com in Window7 Forget the MySQL ROOT password in Windows 7 The solution is as follows: 1. stop mysql service Net stop mysql 2. start mysql without checking permissions Mysqld -- skip-grant-tables You can

Mysql format example bitsCN.com Mysql format example I wrote a mysql formatting example. DELIMITER $ Drop procedure if exists 'testdb'. 'test _ p_getTimeRange '$ Create definer = 'ipd' @ '%' PROCEDURE 'test _ p_getTimeRange '(OUT

Install bitsCN.com on the DBI and DBD-mysql modules Install the DBI and DBD-mysql modules I. DBI installation Wget http://www.cpan.org/modules/by-module/DBD/DBI-1.604.tar.gz Tar-zxvf DBI-1.604.tar.gz Cd DBI-1.604 Perl Makefile. PL Make Make

Analysis of Mysql data Rollback Error solution bitsCN.com Solutions to Mysql data rollback errors This section describes how to solve Mysql data rollback errors. For more information, see There are two main methods to process MYSQL transactions.

Introduction to MySQL advanced query and GroupBy collection bitsCN.com MySQL advanced query and use of Group By sets In MySQL, you can obtain the join value of expression combinations. You can use DISTINCT to delete duplicate values. If you want

MySql multi-to-multi-link foreign key application Mysql foreign key BitsCN.com Business Requirements: The user table r_user stores user name and other information. Now you need to set up a work base for each user. one user can have multiple work

Mysql User-defined functions implement string matching bitsCN.com Mysql User-defined functions implement string matching First: The first parameter of the fSearch function is a single string (that is, no special string is separated) The first

Difference and advantages of timestamp, datetime, int type in mysql bitsCN.com Differences and advantages of timestamp, datetime, and int types in mysql Int 1. occupies 4 bytes 2. fast query after an index is created 3. you can use between for

[Mysql] shell runs mysql SQL statement bitsCN.com [Mysql] SQL statement used by shell to run mysql Shell itself is a scripting language, so it cannot connect to the database through APIs like java. Shell still needs to execute SQL statements by

Modify the character set encoding of MySQL5.6 in Linux to UTF8 (to solve Chinese garbled characters) bitsCN.com Modify the character set encoding of MySQL5.6 in Linux to UTF8 (to solve Chinese garbled characters) 1. log on to MySQL and use show

Usage of mysqltoolkit [memo] bitsCN.com Mysql toolkit is a small plug-in used to monitor and analyze databases. it is usually used to call perl to analyze and compare the current environment and database. it is worth learning.

Use mydumper to back up MySQL database bitsCN.com with multiple threads Mysqldump: one of its features is that the list needs to be locked during processing. Therefore, if we need to perform backup during working hours, it will cause DML blocking.

Modify mysql database password bitsCN.com How can I reset a password when I forget the password of mysql? 1. use mysqladmin to change the mysql passwordC:/> mysqladmin-udbuser-p password newpassEnter password: oldpassOf course, the premise of

Analysis on master-slave replication process of MySQL server bitsCN.com The master-slave replication of the MySQL server is divided into two situations: the MySQL version of the slave server in the replication structure is the same or higher than

Implementation of auto-incrementing sequence generator bitsCN.com Implementation idea of auto-incrementing sequence generator l requirement u achieves the equivalent function of auto-incrementing field values in MySQL; the auto-incrementing field

MySQL experience 8-1-use a client program to back up and restore bitsCN. comMySQL experience 8-1-use the client program to back up and restore 1. the loss or destruction of data in the backup and recovery requirements analysis database may be due to

Learn PHPamp; amp; MySQL-character encoding (2) bitsCN.com Next to PHP & MYSQL-character encoding (1), this article mainly describes MySQL garbled characters and character set settings. MySQL character set conversion process is as follows: This