Storage and Retrieval

Storage and Retrieval

1. Database Management System (DBMS)

   • The role of a DBMS in handling access to a database
   • The independence of data from the DBMS

2. Tools

   • Storage & Retrieval
     • Extracting relevant information
     • Selecting data (QBE & SQL)
   • Hypermedia search
     • Free text searching
     • Operation of a search engine

3. Storage Media

   • CD-ROM's
   • Hard disks
   • Cartridge & Tape

4. Types

   • Online & offline storage
   • Encryption & Decryption
   • Centralised & distributed databases
   • Back up & security procedures
   • Direct & sequential acccess