MongoDB指定类型查询数据

1.查看集合

show collections

2.向集合中添加数据

db.runoob.insertMany([

{

'title':'data1',

'url':'https://blog.51cto.com/suyanzhu',

'description':'this is data1',

'view':5000

},

{

'title':'data2',

'url':'https://blog.51cto.com/suyanzhu',

'description':'this is data2',

'view':3650

},

{

'title':'data3',

'url':'https://blog.51cto.com/suyanzhu',

'description':'this is data3',

'view':9527

}

])

3.向集合添加数据

db.runoob.insert({

        title: 222, 

        description: 'mongodb',

        by: 'suyanzhu',

        url: 'https://blog.51cto.com/suyanzhu',

        tags: ['php','mongodb'],

        likes: 200

})

4.查看所有数据

db.runoob.find().pretty()

5.根据类型查询数据

// 查询title类型为字符串的数据

db.runoob.find({'title':{$type:2}}).pretty()

// 或

db.runoob.find({'title':{$type:'string'}}).pretty()

//查询title类型为数值的数据

db.runoob.find({'title':{$type:1}}).pretty()

// 或

db.runoob.find({'title':{$type:'double'}}).pretty()