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@ -37,6 +37,7 @@ Note that you can use `thetaSketch` aggregator on columns which were not ingeste
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### Post Aggregators
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#### Sketch Estimator
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```json
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{
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"type" : "thetaSketchEstimate",
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@ -71,6 +72,7 @@ to answer above questions, you would index your data using following aggregator.
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```
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then, sample query for, How many unique users visited product A?
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```json
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{
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"queryType": "groupBy",
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