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Here you will find a documentation of the Mongo shell commands: http://docs.mongodb.org/manual/core/crud-introduction/

// Returns all documents
db.zipcode.find();
 
// Returns all cities name and sorted by them
db.zipcode.find({}, {city: 1}).sort({city: 1})
 
// Create a new zipcode document
db.zipcode.insert({_id: '99999', city: 'LEIPZIG', pop: 520838, state: 'SN'})
 
// Analyze the find-query
db.zipcode.find().explain()
 
// Show the statistics of the collection
db.zipcode.stats();

In console mode, there is no pager. Therefore, all records are loaded for each query. Because this can be a very large amount of data in circumstances, the result is limited to 100 documents. It is recommended to use the functions skip () and limit ().

Using a single command, the semicolon at the end is optional.

function () {
	var stats = db.zipcode.stats();
	var index = db.zipcode.getIndexes();
	return {
		stats: stats,
		indexInformation: index
	};
}

The console mode only works if the server instance of Mongo has enabled server-side JavaScript. This is enabled by default.