MongoDB使用

登录MongoDB

 

[root@oracle11g ~]# mongo

 

MongoDB shell version: 2.4.9

connecting to: test

 

> use admin

 

switched to db admin

 

> show dbs

 

admin   (empty)

local   0.078125GB

 

 

使用新的数据库my_mongodb

 

> use my_mongodb

 

switched to db my_mongodb

 

 

插入三条数据

 

> db.user.insert({uid:1,username:"Tom",age:25});

> db.user.insert({uid:2,username:"Jerry",age:25});

> db.user.insert({uid:1,username:"oracle",age:30});

 

向数据库my_mongodb的表user中插入了2条记录。MongoDB会隐式的创建数据库my_mongodb和表user

 

 

查看当前数据库

 

> show dbs

 

admin   (empty)

local   0.078125GB

my_mongodb      0.203125GB

 

 

查看当前连接

 

> show collections

 

system.indexes

user

 

 

查看user表中的数据

 

> db.user.find();

 

{ "_id" : ObjectId("55823677108162d31a1af236"), "uid" : 1, "username" : "Tom", "age" : 25 }

{ "_id" : ObjectId("55823696108162d31a1af237"), "uid" : 2, "username" : "Jerry", "age" : 25 }

{ "_id" : ObjectId("558236c0108162d31a1af238"), "uid" : 1, "username" : "oracle", "age" : 30 }

 

 

查找username是 Jerry的数据

 

> db.user.find({username:"Jerry"});

 

{ "_id" : ObjectId("55823696108162d31a1af237"), "uid" : 2, "username" : "Jerry", "age" : 25 }

 

 

更新uid是 2的 age 为 100

 

> db.user.update({uid:2},{$set:{age:100}}) ;

 

 

检查数据是否更新成功

 

> db.user.find({uid:2});

 

{ "_id" : ObjectId("55823696108162d31a1af237"), "uid" : 2, "username" : "Jerry", "age" : 100 }