Adding tabs

Author: SnehaGunda

articles/cosmos-db/cassandra-change-feed.md

@@ -17,6 +17,7 @@ The following example shows how to get a change feed on all the rows in a Cassan
 
 In each iteration, the query resumes at the last point changes were read, using paging state. We can see a continuous stream of new changes to the table in the Keyspace. We will see changes to rows that are inserted, or updated. Watching for delete operations using change feed in Cassandra API is currently not supported.
 
+# [C#](#tab/c#)
 ```C#
     //set initial start time for pulling the change feed
      DateTime timeBegin = DateTime.UtcNow;
@@ -65,6 +66,7 @@ In each iteration, the query resumes at the last point changes were read, using
     }
 
 ```
+# [Java](#tab/java)
 ```java
         Session cassandraSession = utils.getSession();
 
@@ -99,19 +101,25 @@ In each iteration, the query resumes at the last point changes were read, using
         }
 
 ```
+---
+
 In order to get the changes to a single row by primary key, you can add the primary key in the query. The following example shows how to track changes for the row where "user_id = 1"
 
+# [C#](#tab/c#)
 ```C#
     //Return the latest change for all row in 'user' table where user_id = 1
     IStatement changeFeedQueryStatement = new SimpleStatement(
     $"SELECT * FROM uprofile.user where user_id = 1 AND COSMOS_CHANGEFEED_START_TIME() = '{timeBegin.ToString("yyyy-MM-ddTHH:mm:ss.fffZ", CultureInfo.InvariantCulture)}'");
 
 ```
+
+# [Java](#tab/java)
 ```java
     String query="SELECT * FROM uprofile.user where user_id=1 and COSMOS_CHANGEFEED_START_TIME()='" 
            			+ dtf.format(now)+ "'";
     SimpleStatement st=new  SimpleStatement(query);
 ```
+---
 ## Current limitations
 
 The following limitations are applicable when using change feed with Cassandra API: