# [mysql dir]/bin/mysql -h hostname -u root -p

mysql> create database [databasename];

mysql> show databases;

mysql> use [db name];

mysql> show tables;

mysql> describe [table name];

mysql> drop database [database name];

mysql> drop table [table name];

mysql> SELECT * FROM [table name];

mysql> show columns from [table name];

mysql> SELECT * FROM [table name] WHERE [field name] = "whatever";

mysql> SELECT * FROM [table name] WHERE name = "Bob" AND phone_number = '3444444';

mysql> SELECT * FROM [table name] WHERE name != "Bob" AND phone_number = '3444444' order by phone_number;

mysql> SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number = '3444444';

mysql> SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number = '3444444' limit 1,5;

mysql> SELECT * FROM [table name] WHERE rec RLIKE "^a";

mysql> SELECT DISTINCT [column name] FROM [table name];

mysql> SELECT [col1],[col2] FROM [table name] ORDER BY [col2] DESC;

mysql> SELECT COUNT(*) FROM [table name];

mysql> SELECT SUM(*) FROM [table name];

mysql> select lookup.illustrationid, lookup.personid,person.birthday from lookup left join person on lookup.personid=person.personid=statement to join birthday in person table with primary illustration id;

# mysql -u root -p
mysql> use mysql;
mysql> INSERT INTO user (Host,User,Password) VALUES('%','username',PASSWORD('password'));
mysql> flush privileges;

# [mysql dir]/bin/mysqladmin -u username -h hostname.blah.org -p password 'new-password'

# /etc/init.d/mysql stop
# mysqld_safe --skip-grant-tables &
# mysql -u root

mysql> use mysql;
mysql> update user set password=PASSWORD("newrootpassword") where User='root';
mysql> flush privileges;
mysql> quit

# /etc/init.d/mysql stop
# /etc/init.d/mysql start

# mysqladmin -u root password newpassword

# mysqladmin -u root -p oldpassword newpassword

# mysql -u root -p

mysql> use mysql;
mysql> grant usage on *.* to bob@localhost identified by 'passwd';
mysql> flush privileges;

 mysqldump -h database_ip -u Username --password=123456 --opt databasename > backup-file.sql
 mysqldump -h database_ip -d -u Username --password=123456 databasename >database_structure.sql

# mysql -u root -p

mysql> use mysql;
mysql> INSERT INTO db (Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv,Create_priv,Drop_priv) VALUES ('%','databasename','username','Y','Y','Y','Y','Y','N');
mysql> flush privileges;

mysql> grant all privileges on databasename.* to username@localhost;
mysql> flush privileges;

mysql> UPDATE [table name] SET Select_priv = 'Y',Insert_priv = 'Y',Update_priv = 'Y' where [field name] = 'user';

mysql> DELETE from [table name] where [field name] = 'whatever';

mysql> flush privileges;

mysql> alter table [table name] drop column [column name];

mysql> alter table [table name] add column [new column name] varchar (20);

mysql> alter table [table name] change [old column name] [new column name] varchar (50);

mysql> alter table [table name] add unique ([column name]);

mysql> alter table [table name] modify [column name] VARCHAR(3);

mysql> alter table [table name] drop index [colmn name];

mysql> LOAD DATA INFILE '/tmp/filename.csv' replace INTO TABLE [table name] FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' (field1,field2,field3);

# [mysql dir]/bin/mysqldump -u root -ppassword --opt >/tmp/alldatabases.sql

# [mysql dir]/bin/mysqldump -u username -ppassword --databases databasename >/tmp/databasename.sql

# [mysql dir]/bin/mysqldump -c -u username -ppassword databasename tablename > /tmp/databasename.tablename.sql

# [mysql dir]/bin/mysql -u username -ppassword databasename < /tmp/databasename.sql

mysql> CREATE TABLE [table name] (firstname VARCHAR(20), middleinitial VARCHAR(3), lastname VARCHAR(35),suffix VARCHAR(3),officeid VARCHAR(10),userid VARCHAR(15),username VARCHAR(8),email VARCHAR(35),phone VARCHAR(25), groups VARCHAR(15),datestamp DATE,timestamp time,pgpemail VARCHAR(255));

mysql> create table [table name] (personid int(50) not null auto_increment primary key,firstname varchar(35),middlename varchar(50),lastnamevarchar(50) default 'bato');

 select title from book into outfile '/tmp/outfile.txt';

 select * from people where peopleId in (select peopleId from people group by 
 peopleId having count(peopleId) > 1);

 select * from phome_ecms_wma where title in (select distinct title from phome_ecms_wma);

 select *,count(distinct title) INTO OUTFILE '/tmp/table.bak' from phome_ecms_wma group by title;
 delete from phome_ecms_wma;
 LOAD DATA INFILE '/tmp/table.bak' REPLACE INTO TABLE phome_ecms_wma character set utf8;

 SELECT *FROM url ORDER BY RAND() LIMIT 5;

 mysql> show variables like "character_set%";

 mysql> alter table table_name change last_action last_action datetime NOT NULL default '0000-00-00 00:00:00';

 mysql> ALTER TABLE host ADD ks_mac VARCHAR(100);

 mysql> ALTER TABLE table_name DROP field_name; 

 mysql>alter table t1 rename t2;

 mysql> alter table tablename add index 索引名 (字段名1[，字段名2 …]);
 mysql> alter table tablename add index emp_name (name);

 mysql> alter table tablename add primary key(id);

 mysql> alter table tablename add unique emp_name2(cardnumber);

 mysql>alter table tablename drop index emp_name;

 mysql> GRANT ALL PRIVILEGES ON database_test.* to root@192.168.1.9 IDENTIFIED BY '123456';
 mysql> FLUSH PRIVILEGES;