mirror of
https://github.com/chubin/cheat.sheets
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45 lines
1.6 KiB
Plaintext
45 lines
1.6 KiB
Plaintext
// Insert a new document in a collection
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db.books.insert({"isbn": 9780060859749, "title": "After Alice: A Novel", "author": "Gregory Maguire", "category": "Fiction", "year":2016})
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// Insert multiple documents into a collection
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db.books.insert([
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{ "isbn":"9781853260001", "title": "Pride and Prejudice", "author": "Jane Austen", "category": "Fiction"},
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{"isbn": "9780743273565", "title": "The Great Gatsby", "author": "F. Scott Fitzgerald"}
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])
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// Show all documents in the collection
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db.collection.find()
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// Filter documents by field value condition
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db.books.find({"title":"Treasure Island"})
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// Show only some fields of matching documents
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db.books.find({"title":"Treasure Island"}, {title:true, category:true, _id:false})
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// Show the first document that matches the query condition
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db.books.findOne({}, {_id:false})
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// Update specific fields of a single document that match the query condition
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db.books.update({title : "Treasure Island"}, {$set : {category :"Adventure Fiction"}})
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// Remove certain fields of a single document the query condition:
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// $unset
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db.books.update({title : "Treasure Island"}, {$unset : {category:""}})
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// Remove certain fields of all documents that match the query condition
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// $unset, {multi:true}
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db.books.update({category : "Fiction"}, {$unset : {category:""}}, {multi:true})
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// Delete a single document that match the query condition
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// {justOne:true}
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db.books.remove({title :"Treasure Island"}, {justOne:true})
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// Delete all documents matching a query condition
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db.books.remove({"category" :"Fiction"})
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// Delete all documents in a collection
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db.books.remove({})
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// Drop a collection
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db.books.drop()
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