Update single-key.md

ViktarStarastsenka · web-flow · commit 9bb4c0351df8 · 2024-02-28T18:35:59.000+01:00
diff --git a/src/ds/ts/single-key.md b/src/ds/ts/single-key.md
@@ -1,5 +1,3 @@
-## Single-key aggregations
-
 The previous tutorial showed that the `TS.RANGE` and `TS.REVRANGE` commands can take an optional `AGGREGATION` argument. Aggregations using the `RANGE` commands allow you to make ad hoc queries using, perhaps, a different aggregator than what you've used in your aggregation rules. In the following example, data are aggregated the `avg` function, calculating and reporting average daily sales for a bike shop.
 
 ```redis AGGREGATION in action

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`@@ -1,5 +1,3 @@`
`1`		`-## Single-key aggregations`
`2`		`-`
`3`	`1`	The previous tutorial showed that the `TS.RANGE` and `TS.REVRANGE` commands can take an optional `AGGREGATION` argument. Aggregations using the `RANGE` commands allow you to make ad hoc queries using, perhaps, a different aggregator than what you've used in your aggregation rules. In the following example, data are aggregated the `avg` function, calculating and reporting average daily sales for a bike shop.
`4`	`2`
`5`	`3`	```redis AGGREGATION in action