File Organization The database is stored as a collection of files.Each file is a sequence of records.A record is a sequence of fields. One approach Assume record size is fixed Each file has records of one particular type only Different files are used for different relations This case is easiest to implement;will consider variable length records later We assume that records are smaller than a disk block Database System Concepts-7th Edition 13.2 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 13.2 ©Silberschatz, Korth and Sudarshan th Edition File Organization ▪ The database is stored as a collection of files. Each file is a sequence of records. A record is a sequence of fields. ▪ One approach • Assume record size is fixed • Each file has records of one particular type only • Different files are used for different relations This case is easiest to implement; will consider variable length records later ▪ We assume that records are smaller than a disk block