Full text retrieval or full text search is a technique by which you can search a computer stored document or database. How does it work?
In a full text search, the search engine checks all of the words in every stored document like it is matching the search words given by the user. This full text searching is very popular and became common for bibliographic databases. Now many websites and application programs provide full text searching.
to a technique for searching a computer-stored document or database. Some big web search engines like AltaVista employ full text search techniques while other search engine index only a portion of the web pages examined by its indexing system.