Can it is possible to create a custom field which value fetch from external database

[Ankit Agarwal]

1- I want to create custom field which value fetch from external database as well as value of custom field    renderable  from html.

2- html is stored in external database.

3- After execution of each text case custom field value is updated from database and show on every bug screen

[Peter Bengov]

This is indeed possible via this free plugin Kepler's Database Custom Field.

Here is all relevant information for seting this plugin and configuring the database fields: http://confluence.kepler-rominfo.com/pages/viewpage.action?pageId=4161555