Shulou(Shulou.com)06/02 Report--

Added: db.collection_name.insert

Delete: db.collection_name.remove

Update: db.collection_name.update

Query: db.collection_name.find () .pretty ()

Operation example:

1. Create a database

Use test2

two。 Show all current databases

Show dbs

3. The test2 you just created will not be displayed. You need to insert some data into it.

Db.test2.insert ({"name": "I am your uncle"})

two。 Delete database

1. Connect to the database

Use test2

two。 Perform deletion

Db.dropDatabase ()

three。 Create a collection

Use test2

Db.createCollection ("test3")

Show collections

four。 Delete a collection

Use test2

Db.test3.drop ()

five。 New document

Use test2

Db.test3.insert ({title: 'MongoDB tutorial'

Description: 'MongoDB is a Nosql database'

By: 'tutorial'

Url: 'http://www.runoob.com',

Tags: ['mongodb',' database', 'NoSQL']

Likes: 100})

Db.test3.insert ({

Title: 'PHP tutorial'

Description: 'PHP is a powerful server-side scripting language for creating dynamic interactive sites.'

By: 'tutorial'

Url: 'http://www.runoob.com',

Tags: ['php']

Likes: 150})

Db.test3.insert ({

Title: 'TEST tutorial'

Description: 'TEST is a powerful server-side scripting language for creating dynamic interactive sites.'

By: 'tutorial'

Url: 'http://www.runoob.com',

Tags: ['test']

Likes: 200})

Check whether the document has been added successfully:

Db.test3.find () .pretty ()

six。 Update document

Db.test3.update ({'title':'MongoDB tutorial'}, {$set: {'title':'MongoDB'}})

seven。 Delete document

Db.test3.remove ({"title": "TEST tutorial"})

eight。 Query documents, query data in documents with a likelihood value greater than or equal to 150

MongoDB Enterprise > db.test.find ({likes: {$gte: 150}})

{"_ id": ObjectId ("5dd110022ad82fd1af1a82e0"), "title": "PHP tutorial", "description": "PHP is a powerful server-side scripting language for creating dynamic interactive sites." , "by": "tutorial", "url": "http://www.runoob.com"," tags ": [" php "]," likes ": 150}

{"_ id": ObjectId ("5dd110382ad82fd1af1a82e1"), "title": "TEST tutorial", "description": "TEST is a powerful server-side scripting language for creating dynamic interactive sites." , "by": "tutorial", "url": "http://www.runoob.com"," tags ": [" test "]," likes ": 200}

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