Created
November 2, 2015 18:12
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| db.annualHomePrices.aggregate([ | |
| {$project: | |
| { | |
| Year: "$year", | |
| hightToLowPriceGap: { | |
| $subtract: ["$highestPrice", "$lowestPrice"] | |
| }, | |
| _id: 0 | |
| } | |
| } | |
| ]) |
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