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-- SQL
CREATE TABLE USERS (a Number, b Number)

-- Mongo
db.createCollection("mycoll")

-------------------------------------------

-- SQL
INSERT INTO USERS VALUES(3, 5)

-- Mongo
db.users.insert({a:3, b:5})

-------------------------------------------

-- SQL
SELECT a,b FROM users

-- Mongo
db.users.find({}, {a:1, b:1})

-------------------------------------------

-- SQL
SELECT * FROM users

-- Mongo
db.users.find()

-------------------------------------------

-- SQL
SELECT * FROM users WHERE age=33

-- Mongo
db.users.find({age:33})

-------------------------------------------

-- SQL
SELECT a,b FROM users WHERE age=33

-- Mongo
db.users.find({age:33}, {a:1, b:1})

-------------------------------------------

-- SQL
SELECT * FROM users WHERE age=33 ORDER BY name

-- Mongo
db.users.find({age:33}).sort({name:1})

-------------------------------------------

-- SQL
SELECT * FROM users WHERE age>33

-- Mongo
db.users.find({age:{$gt:33}})

-------------------------------------------

-- SQL
SELECT * FROM users WHERE age!=33

-- Mongo
db.users.find({age:{$ne:33}})

-------------------------------------------

-- SQL
SELECT * FROM users WHERE name LIKE "%Joe%"

-- Mongo
db.users.find({name:/Joe/})

-------------------------------------------

-- SQL
SELECT * FROM users WHERE name LIKE "Joe%"

-- Mongo
db.users.find({name:/^Joe/})

-------------------------------------------

-- SQL
SELECT * FROM users WHERE age>33 AND age<=40

-- Mongo
db.users.find({'age':{$gt:33,$lte:40}})

-------------------------------------------

-- SQL
SELECT * FROM users ORDER BY name DESC

-- Mongo
db.users.find().sort({name:-1})

-------------------------------------------

-- SQL
SELECT * FROM users WHERE a=1 and b='q'

-- Mongo
db.users.find({a:1,b:'q'})

-------------------------------------------

-- SQL
SELECT * FROM users LIMIT 10 SKIP 20

-- Mongo
db.users.find().limit(10).skip(20)

-------------------------------------------

-- SQL
SELECT * FROM users WHERE a=1 or b=2

-- Mongo
db.users.find( { $or : [ {a:1} , {b:2} ] } )

-------------------------------------------

-- SQL
SELECT * FROM users LIMIT 1

-- Mongo
db.users.findOne()

-------------------------------------------

-- SQL
SELECT order_id FROM orders o, order_line_items li WHERE li.order_id=o.order_id AND li.sku=12345

-- Mongo
db.orders.find({"items.sku":12345},{_id:1})

-------------------------------------------

-- SQL
SELECT customer.name FROM customers,orders WHERE orders.id="q179" AND orders.custid=customer.id

-- Mongo
var o = db.orders.findOne({_id:"q179"});
var name = db.customers.findOne({_id:o.custid})

-------------------------------------------

-- SQL
SELECT DISTINCT last_name FROM users

-- Mongo
db.users.distinct('last_name')

-------------------------------------------

-- SQL
SELECT COUNT(*y) FROM users

-- Mongo
db.users.count()

-------------------------------------------

-- SQL
SELECT COUNT(*y) FROM users where AGE > 30

-- Mongo
db.users.find({age: {'$gt': 30}}).count()

-------------------------------------------

-- SQL
SELECT COUNT(AGE) from users

-- Mongo
db.users.find({age: {'$exists': true}}).count()

-------------------------------------------

-- SQL
CREATE INDEX myindexname ON users(name)

-- Mongo
db.users.ensureIndex({name:1})

-------------------------------------------

-- SQL
CREATE INDEX myindexname ON users(name,ts DESC)

-- Mongo
db.users.ensureIndex({name:1,ts:-1})

-------------------------------------------

-- SQL
EXPLAIN SELECT * FROM users WHERE z=3

-- Mongo
db.users.find({z:3}).explain()

-------------------------------------------

-- SQL
UPDATE users SET a=1 WHERE b='q'

-- Mongo
db.users.update({b:'q'}, {$set:{a:1}}, false, true)

-------------------------------------------

-- SQL
UPDATE users SET a=a+2 WHERE b='q'

-- Mongo
db.users.update({b:'q'}, {$inc:{a:2}}, false, true)

-------------------------------------------

-- SQL
DELETE FROM users WHERE z="abc"

-- Mongo
db.users.remove({z:'abc'});

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