commands

$ mysqldump -u root --all-databases > alldatabases.sql
$ mysqldump -u username -ppassword --databases databasename >/tmp/databasename.sql (Dump one database for backup.)
$ mysqldump -c -u username -ppassword databasename tablename > /tmp/databasename.tablename.sql (Dump a table from a database)
$ mysql -u root < alldatabases.sql
$ mysql -u root [databasename] < youfile.sql

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

$ show databases;
$ create database [databasename];
$ drop database [database name];
$ use [db name];

$ show tables;
$ create table [table name] (column1 integer, column2 char(10), column3 VARCHAR(20), datestamp DATE, timestamp time);
$ create table [table name] (personid int(50) not null auto_increment primary key,firstname varchar(35),middlename varchar(50),lastnamevarchar(50) default 'bato');
$ describe [table name];
$ desc [table name];
$ show columns from [table name];

$ INSERT INTO [table name] (Host,User,Password) VALUES ('%', 'user', PASSWORD('password'));

$ SELECT * FROM [table name];
$ SELECT * FROM [table name] WHERE [field name] = "whatever";
$ SELECT * FROM [table name] WHERE name = "Bob" AND phone_number = '3444444';
$ SELECT * FROM [table name] WHERE name != "Bob" AND phone_number = '3444444' order by phone_number;
$ SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number = '3444444';
$ SELECT DISTINCT [column name] FROM [table name];
$ SELECT [col1],[col2] FROM [table name] ORDER BY [col2] DESC | ASC;
$ SELECT COUNT(*) FROM [table name];


$ SELECT * FROM [table name] WHERE rec RLIKE "^a$";
$ SELECT * FROM [table name] WHERE rec RLIKE "^a$"; (Use a regular expression to find records. Use "REGEXP BINARY" to force case-sensitivity. This finds any record beginning with a.)

$ alter table [table name] add column [new column name] varchar (20), add column [new column name 2] time;
$ alter table [table name] drop column [column name];
$ alter table [table name] change [old column name] [new column name] varchar (50);
$ alter table [table name] add unique ([column name]);
$ alter table [table name] modify [column name] VARCHAR(3);
$ alter table [table name] drop index [colmn name];

$ LOAD DATA INFILE '/tmp/filename.csv' replace INTO TABLE [table name] FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' (field1,field2,field3); (Load a CSV file into a table.)

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

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

$ drop table [table name];

$ SELECT SUM(*) FROM [table name];

$ 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;

$ FLUSH PRIVILEGES; (Update database permissions/privilages.)

--- switch to mysql db

$ INSERT INTO [table name] (Host,User,Password) VALUES('%','user',PASSWORD('password'));
$ mysqladmin -u root -h hostname.blah.org -p password 'new-password' (from unix shell)
$ SET PASSWORD FOR 'user'@'hostname' = PASSWORD('passwordhere'); (from mysql prompt)
$ grant usage on *.* to bob@localhost identified by 'passwd';
$ INSERT INTO [table name] (Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv,Create_priv,Drop_priv) VALUES ('%','databasename','username','Y','Y','Y','Y','Y','N');

OR

$ grant all privileges on databasename.* to username@localhost;