mongdb和sql对比
来源:互联网 发布:linux 用户安装anconda 编辑:程序博客网 时间:2024/05/29 19:16
CREATE TABLE USERS (a Number, b Number)
ALTER TABLE users ADD ...
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:{$gt:33}})
SELECT * FROM users WHERE age!=33
db.users.find({age:{$ne: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 LIMIT 10 SKIP 20
db.users.find().limit(10).skip(20)
SELECT * FROM users WHERE a=1 or b=2
db.users.find( { $or : [ { a : 1 } , { b : 2 } ] } )
SELECT * FROM users LIMIT 1
db.users.findOne()
SELECT order_id FROM orders o, order_line_items li WHERE li.order_id=o.order_id AND li.sku=12345
db.orders.find({"items.sku":12345},{_id:1})
SELECT customer.name FROM customers,orders WHERE orders.id="q179" AND orders.custid=customer.id
var o = db.orders.findOne({_id:"q179"});var name = db.customers.findOne({_id:o.custid})
SELECT DISTINCT last_name FROM users
db.users.distinct('last_name')
SELECT COUNT(*y)FROM users
db.users.count()
SELECT COUNT(*y)FROM users where AGE > 30
db.users.find({age: {'$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'});
阅读全文
0 0
- mongdb和sql对比
- Mongdb安全和认证
- mongdb安装和使用
- HBase与MongDB等NoSQL数据库对比
- HBase与MongDB等NoSQL数据库对比
- HBase与MongDB等NoSQL数据库对比
- oracle和sql功能对比
- SQL 和Mongo 对比图表
- mongdb
- mongdb
- MongDB
- Mongdb
- mongdb
- mongdb
- MongDB介绍入门和使用
- [mongdb]安装mongodb和将mongdb设置为windows服务
- SQL Server和Oracle常用函数对比
- SQL Server和Oracle常用函数对比
- 用oozie命令行的方式在yarn上运行spark任务
- 温度传感器100k 热水器温度探头
- ObjC如何通过runtime修改Ivar的内存管理方式(一)
- POJ 1330 Nearest Common Ancestors
- 基于OWIN WebAPI 使用OAuth授权服务【客户端模式(Client Credentials Grant)】
- mongdb和sql对比
- JS中 call和apply的区别和作用
- Egret开发经验目录
- matlab中的函数(三)
- Java开发之环境配置报错export `=' not a valid identifier的一般原因
- spring bean的装配
- Centos安装php(含php-fpm)
- java.lang.IllegalArgumentException
- Lintcode 代码