small updates

docs/en/sql-reference/window-functions/dense_rank.md

@@ -1,12 +1,12 @@
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 slug: /en/sql-reference/window-functions/dense_rank
 sidebar_label: dense_rank
-sidebar_position: 2
+sidebar_position: 7
 ---
 
 # dense_rank
 
-This window function ranks the current row within its partition without gaps. In other words, if the value of any new row encountered is equal to the value of one of the previous rows then it will receive the next successive rank without any gaps in ranking.
+Ranks the current row within its partition without gaps. In other words, if the value of any new row encountered is equal to the value of one of the previous rows then it will receive the next successive rank without any gaps in ranking.
 
 The [rank](./rank.md) function provides the same behaviour, but with gaps in ranking.
 

docs/en/sql-reference/window-functions/lagInFrame.md

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 slug: /en/sql-reference/window-functions/lagInFrame
 sidebar_label: lagInFrame
-sidebar_position: 3
+sidebar_position: 8
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 # lagInFrame
 
-Return a value evaluated at the row that is at a specified physical offset before the current row within the ordered frame. The offset parameter, if not specified, defaults to 1, meaning it will fetch the value from the next row. If the calculated row exceeds the boundaries of the window frame, the specified default value is returned.
+Returns a value evaluated at the row that is at a specified physical offset row before the current row within the ordered frame.
 
 **Syntax**
 

docs/en/sql-reference/window-functions/last_value.md

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-slug: /en/sql-reference/window-functions/lagInFrame
-sidebar_label: lagInFrame
+slug: /en/sql-reference/window-functions/last_value
+sidebar_label: last_value
 sidebar_position: 4
 ---
 
-# first_value
+# last_value
 
-Return the last non-NULL value evaluated within its ordered frame.
+Returns the last non-NULL value evaluated within its ordered frame.
 
 **Syntax**
 
 ```sql
-first_value (column_name)
+last_value (column_name)
   OVER ([[PARTITION BY grouping_column] [ORDER BY sorting_column] 
         [ROWS or RANGE expression_to_bound_rows_withing_the_group]] | [window_name])
 FROM table_name

docs/en/sql-reference/window-functions/leadInFrame.md

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 slug: /en/sql-reference/window-functions/leadInFrame
 sidebar_label: leadInFrame
-sidebar_position: 5
+sidebar_position: 9
 ---
 
 # leadInFrame
 
-Return a value evaluated at the row that is offset rows after the current row within the ordered frame.
+Returns a value evaluated at the row that is offset rows after the current row within the ordered frame.
 
 **Syntax**
 

docs/en/sql-reference/window-functions/nth_value.md

@@ -1,14 +1,12 @@
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-slug: /en/sql-reference/window-functions/leadInFrame
-sidebar_label: leadInFrame
-sidebar_position: 6
+slug: /en/sql-reference/window-functions/nth_value
+sidebar_label: nth_value
+sidebar_position: 5
 ---
 
 # nth_value
 
-Return the first non-NULL value evaluated against the nth row (offset) in its ordered frame.
-
-The [dense_rank](./dense_rank.md) function provides the same behaviour but without gaps in ranking.
+Returns the first non-NULL value evaluated against the nth row (offset) in its ordered frame.
 
 **Syntax**
 

docs/en/sql-reference/window-functions/rank.md

@@ -1,12 +1,12 @@
 ---
 slug: /en/sql-reference/window-functions/rank
 sidebar_label: rank
-sidebar_position: 7
+sidebar_position: 6
 ---
 
 # rank
 
-This window function ranks the current row within its partition with gaps. In other words, if the value of any row it encounters is equal to the value of a previous row then it will receive the same rank as that previous row.
+Ranks the current row within its partition with gaps. In other words, if the value of any row it encounters is equal to the value of a previous row then it will receive the same rank as that previous row.
 The rank of the next row is then equal to the rank of the previous row plus a gap equal to the number of times the previous rank was given.
 
 The [dense_rank](./dense_rank.md) function provides the same behaviour but without gaps in ranking. 

docs/en/sql-reference/window-functions/row_number.md

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 slug: /en/sql-reference/window-functions/row_number
 sidebar_label: row_number
-sidebar_position: 8
+sidebar_position: 2
 ---
 
 # row_number
 
-Numbers the current row within its partition starting from 1
+Numbers the current row within its partition starting from 1.
 
 **Syntax**