moved derivative and difference out of aggregate functions, resolves #1059

content/v2.0/query-data/flux/rate.md

@@ -16,7 +16,7 @@ menu:
     name: Rate
 v2.0/tags: [query, rate]
 related:
-  - /v2.0/reference/flux/stdlib/built-in/transformations/aggregates/derivative/
+  - /v2.0/reference/flux/stdlib/built-in/transformations/derivative/
   - /v2.0/reference/flux/stdlib/experimental/aggregate/rate/
 list_query_example: rate_of_change
 ---

content/v2.0/reference/flux/stdlib/built-in/transformations/derivative.md

@@ -7,8 +7,10 @@ aliases:
 menu:
   v2_0_ref:
     name: derivative
-    parent: built-in-aggregates
-weight: 501
+    parent: built-in-transformations
+weight: 402
+aliases:
+  - /v2.0/reference/flux/stdlib/built-in/transformations/aggregates/derivative
 related:
   - /v2.0/query-data/flux/rate/
   - https://docs.influxdata.com/influxdb/latest/query_language/functions/#derivative, InfluxQL – DERIVATIVE()
@@ -18,7 +20,7 @@ The `derivative()` function computes the rate of change per [`unit`](#unit) of t
 It assumes rows are ordered by the `_time` column.
 The output table schema is the same as the input table.
 
-_**Function type:** Aggregate_  
+_**Function type:** Transformation_  
 _**Output data type:** Float_
 
 ```js
@@ -30,6 +32,9 @@ derivative(
 )
 ```
 
+#### Output tables
+For each input table with `n` rows, `derivative()` outputs a table with `n - 1` rows.
+
 ## Parameters
 
 ### unit

content/v2.0/reference/flux/stdlib/built-in/transformations/difference.md

@@ -7,8 +7,10 @@ aliases:
 menu:
   v2_0_ref:
     name: difference
-    parent: built-in-aggregates
-weight: 501
+    parent: built-in-transformations
+weight: 402
+aliases:
+  - /v2.0/reference/flux/stdlib/built-in/transformations/aggregates/difference
 related:
   - https://docs.influxdata.com/influxdb/latest/query_language/functions/#difference, InfluxQL – DIFFERENCE()
 ---
@@ -16,7 +18,7 @@ related:
 The `difference()` function computes the difference between subsequent records.  
 The user-specified columns of numeric type are subtracted while others are kept intact.
 
-_**Function type:** Aggregate_  
+_**Function type:** Transformation_  
 _**Output data type:** Float_
 
 ```js
@@ -27,6 +29,9 @@ difference(
 )
 ```
 
+#### Output tables
+For each input table with `n` rows, `difference()` outputs a table with `n - 1` rows.
+
 ## Parameters
 
 ### nonNegative