Added missing sql/syntaxsql tags

Author: icoric

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

@@ -30,7 +30,7 @@ monikerRange: ">=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-s
 
 ## Syntax  
 
-```    
+```syntaxsql    
 -- Aggregate Function Syntax   
 VAR ( [ ALL | DISTINCT ] expression )  
   
@@ -64,7 +64,7 @@ VAR ([ ALL ] expression) OVER ( [ partition_by_clause ] order_by_clause)
 ### A: Using VAR  
  The following example returns the variance for all bonus values in the `SalesPerson` table in the [!INCLUDE[ssSampleDBnormal](../../includes/sssampledbnormal-md.md)] database.  
 
-```  
+```sql  
 SELECT VAR(Bonus)  
 FROM Sales.SalesPerson;  
 GO  
@@ -75,7 +75,7 @@ GO
 ### B: Using VAR  
  The following example returns the statistical variance of the sales quota values in the table `dbo.FactSalesQuota`. The first column contains the variance of all distinct values and the second column contains the variance of all values including any duplicates values.  
 
-```  
+```sql  
 -- Uses AdventureWorks  
 
 SELECT VAR(DISTINCT SalesAmountQuota)AS Distinct_Values, VAR(SalesAmountQuota) AS All_Values  
@@ -93,7 +93,7 @@ Distinct_Values   All_Values
 ### C. Using VAR with OVER  
  The following example returns the statistical variance of the sales quota values for each quarter in a calendar year. Notice that the ORDER BY in the OVER clause orders the statistical variance and the ORDER BY of the SELECT statement orders the result set.  
 
-```  
+```sql  
 -- Uses AdventureWorks  
 
 SELECT CalendarYear AS Year, CalendarQuarter AS Quarter, SalesAmountQuota AS SalesQuota,