A COMPARATIVE ANALYSIS OF VARIOUS WEB SEARCH ENGINES
Pooja Choudhary · 2012
The main source of an information system is search engine .The layer occupied by relational database management system, in traditional business, environment is supplemented or replaced with a search engine or the technology used to build search engine. The SQL (Structured Query Language) which was used for query for information are now replaced by keyword or searches for structured, semi-structured, or unstructured data. Information is maintained in data tier in a typical multi-tier or entire where it can be stored and retrieved from a database or file system. The data tier is queried by the logic or business tier when information is needed using a data retrieval language like SQL. In a search –oriented architecture the data tier may be replaced or placed behind another tier which contains a search engine and search engine index which is queried instead of the database management system.