Vishal wrote: << ... Here, my doubt is Using Delphi 5 and Firebird database, is it possible for all the instances of this application which are installed at different cities could access one centralized database ? If yes then HOW ? ... >>
You need a fixed IP address for the machine which is hosting the database (the db server). Your program - wherever it runs - just need to use a connection string with <IP address or machine name>:<database path and filename, or alias>, e.g. 123.234.123.234:D:\DB\ourdb.fdb (or possibly VISHAL_SERVER:LIBRARY_DB, with necessary definitions in place). You may have to persuade administrators to open port 3050 in firewalls (in- and outbound). -- Aage J.