Shulou(Shulou.com)06/01 Report--

1. View the collection

Show collections

two。 Add data to the collection

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. View data

Db.runoob.find () .pretty ()

4. Specify the return key (note that only all one or all zero)

Db.runoob.find ({'view': {$gt:5000}}, {title:1,view:1}) .pretty ()

5. No query condition parameters

Db.runoob.find ({}, {title:1,view:1}) .pretty ()

6. Do not return _ id,url, option key

Db.runoob.find ({}, {_ id:0,url:0,description:0}) .pretty ()

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