登录MongoDB
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[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
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使用新的数据库my_mongodb
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> use my_mongodb
switched to db my_mongodb
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插入三条数据
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> 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
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查看当前数据库
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> show dbs
admin (empty)
local 0.078125GB
my_mongodb 0.203125GB
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查看当前连接
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> show collections
system.indexes
user
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查看user表中的数据
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> 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 }
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查找username是 Jerry的数据
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> db.user.find({username:"Jerry"});
{ "_id" : ObjectId("55823696108162d31a1af237"), "uid" : 2, "username" : "Jerry", "age" : 25 }
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更新uid是 2的 age 为 100
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> db.user.update({uid:2},{$set:{age:100}}) ;
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检查数据是否更新成功
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> db.user.find({uid:2});
{ "_id" : ObjectId("55823696108162d31a1af237"), "uid" : 2, "username" : "Jerry", "age" : 100 }
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