몽고DB의 용어와 문법적 차이

발췌: https://docs.mongodb.com/manual/reference/sql-comparison/

* 용어의 차이

RDBMS	MongoDB
TABLE	COLLECTION
ROW	BSON DOCUMENT
COLUMN	FIELD
INDEX	INDEX
PRIMARY KEY	OBJECT_ID FILED
TABLE JOINS (RELATIONSHIP)	EMBEDDED, LINKING

* 쿼리 명령어 차이

SQL	MongoDB
CREATE TALE test (a int, b int)	db.createCollection("test")
INSERT INTO test VALUES (3,5)	db.table.insert({name:3, age:5})
SELECT name, age FROM test	db.table.find({}, {name:1, age:1})
SELECT * FROM test	db.table.find()
SELECT * FROM testWHERE age=34	db.table.find({age:34})
SELECT a,b FROM testWHERE age=34	db.table.find({age:34}, {a:1,b:1})
SELECT * FROM test WHERE age=34 ORDER BY name	db.table.find({age:34}).sort({name:1})
SELECT * FROM test WHERE age>34	db.table.find({'age':{$gt:34}})
SELECT * FROM test WHERE age<34	db.table.find({'age':{$lt:34}})
SELECT * FROM test WHERE name LIKE"%Joe%"	db.table.find({name:/Joe/})
SELECT * FROM test WHERE name LIKE "Joe%"	db.table.find({name:/^Joe/})
SELECT * FROM test WHERE age>34 AND age<=40	db.table.find({'age':{$gt:34,$lte:40}})
SELECT * FROM test  ORDER BY name DESC	db.table.find().sort({name:-1})
SELECT * FROM test WHERE a=1 and b='q'	db.table.find({a:1,b:'q'})
SELECT * FROM test LIMIT 10 SKIP 20	db.table.find().limit(10).skip(20)
SELECT * FROM test WHERE a=1 or b=2	db.table.find( { $or : [ { a : 1 } , { b : 2 } ] } )
SELECT * FROM test LIMIT 1	db.table.findOne()
SELECT DISTINCT last_name FROM test	db.table.distinct('last_name')
SELECT COUNT(*y) FROM test	db.table.count()
SELEC COUNT(*y) FROM test where AGE > 30	db.table.find({age: {'$gt': 30}}).count()
SELECT COUNT(AGE) from test	db.table.find({age: {'$exists':true}}).count()
CREATE INDEX myindexname ON test (name)	db.table.ensureIndex({name:1})
CREATE INDEX myindexname ON test(name,ts DESC)	db.table.ensureIndex({name:1,ts:-1})
EXPLAIN SELECT * FROM users WHERE z=3	db.table.find({z:3}).explain()
UPDATE users SET a=1 WHERE b='q'	db.table.update({b:'q'}, {$set:{a:1}},false,true)
UPDATE users SET a=a+2 WHERE b='q'	db.table.update({b:'q'}, {$inc:{a:2}},false,true)
DELETE FROM users WHERE z="abc"	db.table.remove({z:'ab'});

SQL SELECT 쿼리에 대하여 궁금하다면? [바로가기]

RDBMS Scheme를 몽고DB Data modeling으로 변경 [바로가기]