6월28일 - MongoDB

MongoDB

 

1. 실행

 1) 폴더생성 c:\data\db

 2) 몽고DB 서버실행
     cmd
     cd C:\Program Files\MongoDB\Server\3.2\bin>mongod

 3) 몽고DB 실행
     cmd
     cd C:\Program Files\MongoDB\Server\3.2\bin>mongo  

 

2. 문법

>use mycustomers  --데이터베이스 생성. 이미 만들어진 경우라면 기존의 데이터베이스를 반환한다. mycustomers라는 이름의 db생성

>db.createCollection('customers');

>show dbs         --데이터베이스 목록 조회(새로 생성한 데이터베이스 확인 가능)

>db               --현재 사용하는 데이터베이스 조회
>show collections -- 컬렉션 목록

 

>db.customers.insert({first_name:"John", last_name:"Doe"});
>db.customers.find();
>db.customers.insert([{first_name:"Steven", last_name:"Smith"},{first_name:"Joan", last_name:"Johnson",gender:"female"}]);
>db.customers.find();
>db.customers.find().pretty();

 

 

3. SQL과 NoSQL

 --------------------------------------------------------------------------------------------------
 SQL 문장                                        Mongo 쿼리 문장 
 --------------------------------------------------------------------------------------------------
 CREATE TALE USERS (a int, b int)                db.createCollection("mycoll") 
 INSERT INTO USERS VALUES (3,5)                  db.users.insert({a:3, b:5}) 
 SELECT a, b FROM USERS                          db.users.find({}, {a:1, b:1}) 
 SELECT * FROM users                             db.users.find()
 SELECT * FROM users WHERE age=33                db.users.find({age:33})
 SELECT a,b FROM users WHERE age=33              db.users.find({age:33}, {a:1,b:1})
 SELECT * FROM users WHERE age=33 ORDER BY name  db.users.find({age:33}).sort({name:1})
 SELECT * FROM users WHERE age>33                db.users.find({'age':{$gt:33}})
 SELECT * FROM users WHERE age<33                db.users.find({'age':{$lt:33}})
 SELECT * FROM users WHERE name LIKE"%Joe%"      db.users.find({name:/Joe/})
 SELECT * FROM users WHERE name LIKE "Joe%"      db.users.find({name:/^Joe/})
 SELECT * FROM users WHERE age>33 AND age<=40    db.users.find({'age':{$gt:33,$lte:40}})
 SELECT * FROM users ORDER BY name DESC          db.users.find().sort({name:-1})
 SELECT * FROM users WHERE a=1 and b='q'         db.users.find({a:1,b:'q'})
 SELECT * FROM users WHERE a=1 or b=2            db.users.find( { $or : [ { a : 1 } , { b : 2 } ] } )
 SELECT * FROM users LIMIT 1                     db.users.findOne()
 SELECT DISTINCT last_name FROM users            db.users.distinct('last_name')
 SELECT COUNT(*y) FROM users                     db.users.count()
 SELECT COUNT(*y) FROM users where AGE > 30      db.users.find({age: {'$gt': 30}}).count()
 SELECT COUNT(AGE) from users                    db.users.find({age: {'$exists': true}}).count()
 CREATE INDEX myindexname ON users(name)         db.users.ensureIndex({name:1})
 CREATE INDEX myindexname ON users(name,ts DESC) db.users.ensureIndex({name:1,ts:-1})
 EXPLAIN SELECT * FROM users WHERE z=3           db.users.find({z:3}).explain()
 UPDATE users SET a=1 WHERE b='q'                db.users.update({b:'q'}, {$set:{a:1}}, false, true)
 UPDATE users SET a=a+2 WHERE b='q'              db.users.update({b:'q'}, {$inc:{a:2}}, false, true)
 DELETE FROM users WHERE z="abc"                 db.users.remove({z:'abc'});
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