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 }
转载于:https://www.cnblogs.com/iyoume2008/p/9814624.html
