mysql modify

Log in to the root user and log in to the console with the root user.Use Mysqluse Mysql,mysql is a database created automatically by the MySQL database.Modify the data of the user tableUpdate user set Password=password (' 1234 ') where user= ' root '

MySQL modifies a column, modifying only the type of the column, such as the original Decimal (11,2), to Int (11), which can be writtenALTER TABLE COLUMN int (DEFAULT0' notes ';Note that although you only want to modify the column type, the

I. First, create a test table TableA CREATE TABLE ' TableA ' (' createtime ' int (ten) unsigned not NULL default 0 COMMENT ' createtime ') Engine=myisam auto_incremen T=4 DEFAULT Charset=utf8; Two. Add fields Format: ALTER TABLE tableName ADD

Need to use, tidy up a bit. (change to lowercase for easy viewing)View Table creation statement: show CREATE TABLE table_name;Change table name: ALTER TABLE old_table rename [to] New_table;//renameModify table data type: ALTER TABLE table_name

Modified via MySQL command line:Set Character_set_client=utf8;Set Character_set_connection=utf8; Set Character_set_database=utf8;Set Character_set_results=utf8;Set Character_set_server=utf8;Set Character_set_system=utf8;Set Collation_connection=utf8

http://blog.csdn.net/wobin/article/details/10266165After installing MySQL using the Yum command on CentOS, the default port 3306 can be used to start successfully, but in the/etc/my.cnf, the MySQL boot is unsuccessful and the following information

MySQL version: 5.6.23-enterprise-commercial-advanced, using RPM installationlinux:red Hat Enterprise Linux Server release 6.3 (Santiago)First, if it is Linux under the RPM package installed MySQL, the modified method is as follows:The default data

In a production environment, it is sometimes necessary to modify the password of a copied user account, such as a lost password, or because many different replication users want to unify into a single copy account. This should be done as carefully

mysql| Visit | In MySQL modify password and access restrictions set the details MySQL is a real multi-user, multi-threaded SQL database server. MySQL is implemented as a client/server architecture, consisting of a server daemon mysqld and many

How do I change the MySQL root admin password at the win2k command prompt?>mysql-u root-p Enter Password: Hu Jintao mysql> use MySQL; mysql> Update user Set Password=password (' New_password ') where user= ' root '; In this way, you can modify the

1. Add Default-character-set=utf8 to the [client] field as follows:[client]port = 3306socket = /var/lib/mysql/mysql.sockdefault-character-set=utf82. Add Character-set-server=utf8 to the [mysqld] field as follows:[mysqld]port = 3306socket =

Add a field to a table ALTER TABLE name the type of the Add Field name fieldsExample: ALTER TABLE table1 add transactor varchar (ten) not Null;ALTER TABLE table1 add ID int unsigned not Null auto_increment primary keyHow to add a field after a

To view field encodings:Show full columns from T2;Show variables like '%character% ';Show variables like ' collation_% ';Show variables like ' character_set_% ';To modify the library character set:ALTER DATABASE test character set GBK;To modify a

mysql> help alter tablename:  ' alter table ' description:syntax:alter [online  | OFFLINE] [IGNORE] TABLE tbl_name    [alter_specification  [,  alter_specification]  ...]     [partition_options]alter_specification:    table_options 

View field information for table: DESC table name; View all information about the table: Show create table table name; Add PRIMARY KEY constraint: ALTER TABLE name add constraint primary key (Shape: Pk_ table name) primary key table name

Alter TableTest rename test1;--Modify Table nameAlter TableTestAdd columnNamevarchar(Ten);--Adding table ColumnsAlter TableTestDrop columnName--Delete a table columnAlter TableTest Modify AddressChar(Ten)--modifying table column types||Alter

How to view MySQL default port number and modify port number 2015-03-19 17:42:18 1. Log in to MySQL [Email protected]/]# mysql-u root-p Enter Password: 2. Use the command show global variables like ' port '; View port number

mysql> ALTER TABLE name modify column field name type;For exampleThe Address Table City field in the database is varchar (30)Modification types can be used (careful modification of types may result in errors in existing data)mysql> ALTER TABLE

MySQL database modify character set, introduce the method of modification1) System Tools Iconv#file filename#mysqldump--default-character-set=utf8 >20180523xxx.sql#file 20180523xxx.sql#iconv-t utf8mb4-c 20180523xxx.sql>20180523xxxutf8mb4.sql#file 20

mysql> ALTER TABLE name modify column field name type;For exampleThe Address Table City field in the database is varchar (30)Modification types can be used (careful modification of types may result in errors in existing data)mysql> ALTER TABLE