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# SQL
### MySQL-specific Tricks
To output in tab-delimited format, do something like:
mysql -u root -p -B < some_command.sql > output.tab
### Setup User Permissions
On contemporary Debian, to login as root do:
sudo mysql -u root
Then create a new password-less local-only user:
CREATE USER 'bnewbold'@'localhost' IDENTIFIED BY '';
UPDATE mysql.user SET plugin='unix_socket' WHERE user='bnewbold';
GRANT ALL PRIVILEGES ON * . * TO 'bnewbold'@'localhost';
FLUSH PRIVILEGES;
### UPDATE with JOIN
To do an update based on a join::
UPDATE tableOne t1 INNER JOIN tableTwo t2 ON t1.fk_two = t2.id SET t1.has_two = 1 WHERE t2.is_good = 1;
### JOINs
Useful visual summary: http://www.codeproject.com/Articles/33052/Visual-Representation-of-SQL-Joins
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