Mongodb¶ ↑
Mongodb is
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Schemaless database (Dynamic schema)
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Document database
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Document saved in Binary Json (Bson)
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Tables are converted into collections.
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Records are converted into documents? (is it?)
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Mongo db Document based database
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MongoDB documents are similar to JSON objects.
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Database is created when we try to insert first value
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Tables and column sare created dynamically
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…
COMMANDS
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Start Server: mongod
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Start Shell: mongo
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show dbs
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use db (You can switch to any non-existence db as well)
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db (current db)
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db.users.save({name: ‘Zeeshan})
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db.users.save([{name: ‘Hamza’}, {name: ‘Ali’, location: ‘LHR’}])
CRUD
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db.users.save({data})
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db.users.find({criteria})
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db.users.update({previous_value}, {updated_value})
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db.users.remove({criteria})
REFERENCES
Online Shell: www.tutorialspoint.com/mongodb_terminal_online.php
Tutorial Followed: richonrails.com/articles/mongodb-and-rails