4.1.18. Notation

  • Language
    • PL too complex/long-winded
  • Simplified database model
    • Database as collection of named items
    • Granularity, or size of data item
    • Disk block based, each block X
  • Basic transaction language (BTL)
    • read_item(X);
    • write_item(X);
    • Basic algebra, X=X+N;