What is your database platform. For Oracle the syntax is to_date('1970-01-01', 'YYYY-MM-DD') + [field name]/86400. The filed name in this case would be START_TS. In the MSF GI2 view the timestamp has already been converted to the date time. And be wary of any UTC conditions on your server. You may need to adjust for DST.
I'm not sure what the conversion would be for other DB's but a search on google using temrs such as convert unix time stamp to datetime should give you a place to start.