Created
September 21, 2012 15:08
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Mongodb Group Statement
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| db.element_views.group({ | |
| key: {element_id: true} | |
| , cond: { | |
| browser: 'Chrome', | |
| os: 'MacOS', | |
| device_type: 'Desktop' | |
| } | |
| , reduce: function(v, prev){ | |
| prev.sum++ | |
| } | |
| , initial: {sum: 0} | |
| }) |
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