SQL与NoSQL的CRUD对照



flyfish 2015-7-21



Create, Read, Update and Delete (CRUD)



SQL方式





查

SELECT 列名称 FROM 表名称

SELECT * FROM 表名称

SELECT 列名称 FROM 表名称 WHERE 列 运算符 值

增

INSERT INTO 表名称 VALUES (值1, 值2,....)

INSERT INTO table_name (列1, 列2,...) VALUES (值1, 值2,....)

删

DELETE FROM 表名称 WHERE 列名称 = 值

改

UPDATE 表名称 SET 列名称 = 新值 WHERE 列名称 = 某值

NoSQL方式（MongoDB）



查

db.collection.find(query, projection)

db.products.find( { qty: { $gt: 25 } } )

增

db.collection.insert()

db.products.insert( { item: "card", qty: 15 } )

删

db.collection.remove()

db.products.remove( { qty: { $gt: 20 } } )

改

db.collection.update(query, update, options)

db.people.update(

   { name: "Andy" },

   {

      name: "Andy",

      rating: 1,

      score: 1

   },

   { upsert: true }

)

对照 

SELECT * FROM users WHERE age=18

db.users.find({age:18})

INSERT INTO USERS VALUES('sss',18)

db.users.insert({name:'sss',age:18})

UPDATE users SET age=18 WHERE name='sss'

db.users.update({name:'sss'}, {$set:{age:18}}, false, true)

DELETE FROM users WHERE age=18

db.users.remove({age:18});