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Editor to share with you how to use MongoDB, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

MongoDB is a product between relational database and non-relational database, which is the most functional and most like relational database in non-relational database.

Database operation

# View the database

Show dbs

# switching databases

Use mydatabase

# deleting the current database

Db.dropDatabase () collection operation

# View the collection

Show collections

# deleting a collection

Db.users.drop () document operation

Insert document

Db.users.insert ({name:'harttle', url:' http://harttle.com'})

Query document

# query all

Db.users.find ()

# conditional query

Db.users.find ({name:'harttle'})

# has indented output db.users.find () .pretty ()

Update document

Db.users.update ({name:'harttle'}, {url:' http://harttle.com'})

Delete document

# Delete all

Db.users.remove ({})

# conditional deletion

Db.users.remove ({url:' http://harttle.com'}) above is all the content of this article "how to use MongoDB". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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