Use of DISTINCT is not allowed with the OVER clause.

Example query that doesnt work (docs says it works)

```

SELECT *, count(DISTINCT OrderQty) OVER (PARTITION BY SalesOrderID) AS "Min"  
FROM Sales.SalesOrderDetail   
WHERE SalesOrderID IN(43659,43664);  
GO  

```

Author: meet-bhagdev

docs/t-sql/functions/count-transact-sql.md

@@ -38,18 +38,7 @@ This function returns the number of items found in a group. `COUNT` operates lik
 ## Syntax  
 
 ```sql
--- Syntax for SQL Server and Azure SQL Database  
-  
-COUNT ( { [ [ ALL | DISTINCT ] expression ] | * } )   
-    [ OVER (   
-        [ partition_by_clause ]   
-        [ order_by_clause ]   
-        [ ROW_or_RANGE_clause ]  
-    ) ]  
-```  
-  
-```sql
--- Syntax for Azure SQL Data Warehouse and Parallel Data Warehouse  
+-- Syntax
 
 -- Aggregation Function Syntax  
 COUNT ( { [ [ ALL | DISTINCT ] expression ] | * } )