MySQL from SSH Print

To login (from unix shell) use -h hostname only if needed
# mysql -h hostname -u root -p

Or

#mysql -u root -p

This would ask you for a password and after providing the correct password you’d be logged-in to the MySQL prompt.

Create a database
mysql> create database [database name];

List all databases
mysql> show databases;

Switch to a database
mysql> use [database name];

To see all the tables in the selected database
mysql> show tables;

To see the database’s field formats
mysql> describe [table name];

To delete a database
mysql> drop database [database name];

To delete a table
mysql> drop table [table name];

Show all data in a table
mysql> SELECT * FROM [table name];

Show the columns and column information pertaining to the designated table
mysql> show columns from [table name];

Show certain selected rows with the value “whatever”
mysql> SELECT * FROM [table name] WHERE [field name] = "whatever";

Show all records containing the name “Bob” AND the phone number ‘662113’
mysql> SELECT * FROM [table name] WHERE name = "Bob" AND phone_number = '662113';

Show all records not containing the name “Bob” AND the phone number ‘662113’ order by the phone_number field
mysql> SELECT * FROM [table name] WHERE name != "Bob" AND phone_number = '662113' order by phone_number;

Show all records starting with the letters ‘bob’ AND the phone number ‘662113’
mysql> SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number = '662113';

Show all records starting with the letters ‘bob’ AND the phone number ‘662113’ limit to records 1 through 5
mysql> SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number = '662113' limit 1,5;

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

Show unique records
mysql> SELECT DISTINCT [column name] FROM [table name];

Show selected records sorted in an ascending (asc) or descending (desc)
mysql> SELECT [col1],[col2] FROM [table name] ORDER BY [col2] DESC;

Return number of rows
mysql> SELECT COUNT(*) FROM [table name];

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

Join tables on common columns
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;

Creating a new user (login as root, switch to the MySQL db, make the user, update privs)
# mysql -u root -p
mysql> use mysql;
mysql> INSERT INTO user (Host,User,Password) VALUES('%','username',PASSWORD('password'));
mysql> flush privileges;

Change a user’s password from unix shell
# [mysql dir]/bin/mysqladmin -u username -h hostname.blah.org -p password 'new-password'

Change a user’s password from MySQL prompt (login as root, set the password, update privs)
# mysql -u root -p
mysql> SET PASSWORD FOR 'user'@'hostname' = PASSWORD('passwordhere');
mysql> flush privileges;

Recover a MySQL root password (stop the MySQL server process, start again with no grant tables, login to MySQL as root, set new password, exit MySQL and restart MySQL server)
# /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

Set a root password if there is on root password
# mysqladmin -u root password newpassword

Update a root password
# mysqladmin -u root -p oldpassword newpassword

Allow the user “bob” to connect to the server from localhost using the password “passwd” (login as root, switch to the MySQL db, give privs, update privs)
# mysql -u root -p
mysql> use mysql;
mysql> grant usage on *.* to bob@localhost identified by 'passwd';
mysql> flush privileges;

Give a user privileges for a database (login as root, switch to the MySQL db, grant privs, update privs)
# 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;

or

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

To update info already in a table
mysql> UPDATE [table name] SET Select_priv = 'Y',Insert_priv = 'Y',Update_priv = 'Y' where [field name] = 'user';

Delete a row(s) from a table
mysql> DELETE from [table name] where [field name] = 'whatever';

Update database permissions/privileges
mysql> flush privileges;

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

Add a new column to db
mysql> alter table [table name] add column [new column name] varchar (20);

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

Make a unique column so you get no dupes
mysql> alter table [table name] add unique ([column name]);

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

Delete unique from table
mysql> alter table [table name] drop index [colmn name];

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

Dump all databases for backup. Backup file is sql commands to recreate all db’s
# [mysql dir]/bin/mysqldump -u root -ppassword --opt >/tmp/alldatabases.sql

Dump one database for backup
# [mysql dir]/bin/mysqldump -u username -ppassword --databases databasename >/tmp/databasename.sql

Dump a table from a database
# [mysql dir]/bin/mysqldump -c -u username -ppassword databasename tablename > /tmp/databasename.tablename.sql

Restore database (or database table) from backup
# [mysql dir]/bin/mysql -u username -ppassword databasename < /tmp/databasename.sql

Create Table Example 1
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));

Create Table Example 2
mysql> create table [table name] (personid int(50) not null auto_increment primary key,firstname varchar(35),middlename varchar(50),lastnamevarchar(50) default 'bato');