MySQL common commands and mysqldump backup

I. Character set

1. Create database with default character set

create database if not exists databaseName default charset utf8 collate utf8_general_ci;

2.Character set default configuration

[client]default-character-set=utf8/*[mysqld]*/character-set-server=utf8

3. View Table Character Set

show create table tableName;

4. Modify a single table character set

ALTER TABLE `table` DEFAULT CHARACTER SET utf8;

5. Modify the table field record character set (the table has inserted data)

alter table `tablename` convert to character set utf8;

6. Create table set character set

create table user(id int not null auto_increment,userName varchar(200) not null,password varchar(200) not null,age int,primary key(id))ENGINE=MyISAM auto_increment=1 default charset=utf8;

Second, database connection and backup

1.mysql client cannot connect remotely

GRANT ALL PRIVILEGES ON *.* TO 'user'@'%'IDENTIFIED BY 'password' WITH GRANT OPTION;

2. Backup command

Format: mysqldump -h hostname -P port -u username -p password --database database name > filename.sql

 mysqldump -h 192.168.1.1 -p 3306 -uroot -ppassword --databases mydb> /data/backup/mydb.sql

3. Backup database structure, not data

mysqldump --opt -d database name -u root -p > xxx.sql

4. Export data does not export structure

mysqldump -t database name (table name) -uroot -p > xxx.sql

5. Export the structure of a specific table

mysqldump -uroot -p -B database name --table table name > xxx.sql

6. Import data

#mysql database name < file name#source /tmp/xxx.sql