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MongoDB - Coggle Diagram
MongoDB
Query
Projection: {id: 0, name: 1}
Operator: { "population": { "$gt": 50000, "$lte": 1000000 } }
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In Operator: { "modelYears": { "$in" : [1965, 1966, 1967] }} )
All operator: { "modelYears": { "$all" : [1965, 1966, 1967] }} )
Aggregation:
Who tweets the most:
- Group tweets by user
- count each users tweets
- sort into descending order
- select uesr at top
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Update
update(queryDocument, {$set: {criteria}}), if iexist update, if not create new
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