Below is the hive table i have created:
CREATE EXTERNAL TABLE Activity ( column1 type, column2 type ) ROW FORMAT DELIMITED FIELDS TERMINATED
If you are using Hive version 0.13.0 or higher you can specify "skip.header.line.count"="1" in your table properties to remove the header.
For detailed information on the patch see: https://issues.apache.org/jira/browse/HIVE-5795