add Group By heading to query language docs

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Matt Jaffee 2019-02-06 12:49:57 -06:00
parent 8be84b7c76
commit 75d91e9b63
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@ -858,6 +858,7 @@ Rows(blahk)
{"rows":null,"keys":["haha","zaaa","traa"]}
```
#### Group By
**Spec:**