Yarn
Yarn
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What is Yarn?
Yarn is a JavaScript package manager built by Facebook, Google, Exponent and Tilde.

Its purpose is to solve a handful of problems that these teams faced with npm, namely:
installing packages wasn’t fast/consistent enough
there were security concerns, as npm allows packages to run code on installation
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Create / Open / Delete Database
CREATE DATABASE dbNameYouWant
CREATE DATABASE dbNameYouWant CHARACTER SET utf8
USE dbNameYouWant
DROP DATABASE dbNameYouWant
ALTER DATABASE dbNameYouWant CHARACTER SET utf8
Update
UPDATE table1 SET field1=new_value1 WHERE condition
UPDATE table1, table2 SET field1=new_value1, field2=new_value2, ... WHERE table1.id1 = table2.id2 AND condition
Insert
INSERT INTO table1 (field1, field2, ...) VALUES (value1, value2, ...)
Conditions
field1 = value1
field1 <> value1
field1 LIKE 'value _ %'
field1 IS NULL
field1 IS NOT NULL
field1 IS IN (value1, value2)
field1 IS NOT IN (value1, value2)
condition1 AND condition2
condition1 OR condition2