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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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