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Millise käsuga jagatakse dokumendid MongoDB-s gruppideks välja "department" alus...

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Millise käsuga jagatakse dokumendid MongoDB-s gruppideks välja "department" alusel?

db.collection.aggregate([{$group: {department: "$department"}}])

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db.collection.aggregate([{$group: {_id: "$department"}}])

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db.collection.aggregate([{$groupBy: {department: "$department"}}])

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db.collection.aggregate([{$sort: {department: 1}}])

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