added sql colorizers

Author: icoric

docs/t-sql/language-elements/assignment-operator-transact-sql.md

@@ -27,14 +27,14 @@ monikerRange: ">=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-s
 
   The equal sign (=) is the only [!INCLUDE[tsql](../../includes/tsql-md.md)] assignment operator. In the following example, the `@MyCounter` variable is created, and then the assignment operator sets `@MyCounter` to a value returned by an expression.  
 
-```  
+```sql  
 DECLARE @MyCounter INT;  
 SET @MyCounter = 1;  
 ```  
 
  The assignment operator can also be used to establish the relationship between a column heading and the expression that defines the values for the column. The following example displays the column headings `FirstColumnHeading` and `SecondColumnHeading`. The string `xyz` is displayed in the `FirstColumnHeading` column heading for all rows. Then, each product ID from the `Product` table is listed in the `SecondColumnHeading` column heading.  
 
-```  
+```sql  
 -- Uses AdventureWorks  
 
 SELECT FirstColumnHeading = 'xyz',