mysql modify

1. Stop the MySQL service;2. Modify/ETC/MYSQL/MY.CNFDataDir modified to a new directory;3. Cp-r-p/var/lib/mysql to the new directory (copy with-p, keep the file attributes unchanged);4. Change the owner of the new data file to MySQLChown-r

ALTER [IGNORE] table Tb_name alter_spec,alter_spec ....Alter_specification:ADD [COLUMN] create_definition [first| After column_name]--Add a new fieldAdd index [index name] (index_col_name)--Adds an indexed nameAdd PRIMARY Key

MySQL Change portModify/ETC/MY.CNFAdd port=3308Modified as follows[Mysqld]Datadir=/var/lib/mysqlSocket=/var/lib/mysql/mysql.sockport=3308User=mysql# Disabling Symbolic-links is recommended to prevent assorted security

MySQL Default character setMySQL specifies that the character set can be refined to a single database, a table, and a column. Traditional programs do not use a complex configuration when creating databases and data tables, they use the default

Self-summary, there is any need to correct the supplementary place, please correct me, thank you!Purpose: When the table structure needs to be modified in the project and it needs to be advertised to other colleagues, the efficient way to do this is

Error message: Error 1045 (28000): Access denied for user ' root ' @ ' localhost ' (using Password:yes)MySQL Agent error message: Error (HY000): Lost connection to MySQL Server at ' reading authorization packet ', System error:0Change

Modify table name (RENAME)1. Pass the ALTER keywordALTER TABLE tbl_name RENAME [to | As] new_name;2. By rename keywordRENAME TABLE tbl_name to New_name; (to not omit)Adding a field (add)ALTER TABLE tbl_name ADD field Name field type [integrity

at work, we will encounter the need to change the database storage location, such as: the original database where the disk space is insufficient, and so on. compiling the installed Mysql[[Email protected] ~]# service mysqld status # First see MySQL

When using MySQL, the database name, table name, field name and so on are case-sensitive, this can be set through the configuration file. If you set a strict case sensitivity, you do not notice the case of the table name when you access the table,

modify record If (isset ($ _ post ['btnmodify']) { // verification form omitted $ SQL = "Update animal set where id = '$ _ post [ID]'"; $ result = mysqli_query ($ SQL); // execute update if ($ result) { echo "modification successful! "; } else

This article describes how to modify the size limit when importing a database. When I use phpMyAdmin to import a MySQL database, a database of 15 MB cannot be imported, and a MySQL database can only be imported up to 2 MB .. An error occurred while

First, the general forgotten password solution, need to restart MySQL1, Skip-grant-tablesOur common approach is to use the Skip-grant-tables option, and MYSQLD server does not use the rights system after startup (privilege system). Users do not need

The modified user is in the column root. First, the original myql of the root of the password; Method One: Outside the MySQL system, use the Mysqladmin # mysqladmin-u root-p Password "test123" Enter Password: "Enter the original password"

To improve the security of the server, this lesson is mainly about how to modify the MySQL port under Linux. Support for most system changes in Linux environments, such as CentOS and Ubuntu. Demo Environment: Linux CentOS 6.3 X32Mysql 5.1.66

Method OneUsing phpMyAdmin, this is the easiest, to modify the MySQL library's user table,But don't forget to use password.function。 Method TwoUsing Mysqladmin, this is a special case of the previous declaration.Mysqladmin-u root-p Password

First, mysqladmin-u user name-p old password password new password 1, to root add a password ab12. First in DOS into the directory MySQL bin, and then type the following command Mysqladmin-u Root-password AB12 Note: Since Root does not have a

Modify field arrangement position ALTER table name MODIFY field name 1 data type first| After field name 2 Parameter Description First, optional parameters Change Field 1 to the first field in the table. After field name 2 Insert Field 1 to the back

Modify the database character set from UTF8 to UTF8MB4Modifying the default character set for a libraryalter database test default character set utf8mb4 COLLATE utf8mb4_unicode_ci;Modify the default character set for a tableALTER TABLE test DEFAULT

In CentOS7, the MySQL database file is placed by default in/var/lib, and sometimes the partition is smaller, it needs to be migrated to the larger partition, by the following method1. Stop the MySQL service and copy the/var/lib/mysql directory to a

1) command-line mode# mysqladmin-u root-p ' redhat12345 ' password ' zabbix12345 '-s/data/3306/mysql.sock change password redhat12345 to zabbix123452) SQL statement modification methodmysql> update mysql.user set password= ' 12345 '  where user= '