Lecture 2. Early data models

Readings:

• Michael Stonebraker and Joseph Hellerstein. What Goes Around Comes Around. In "Readings in Database Systems" (aka the Red Book). 4th ed. Read Sections 1-4. [pdf]

While reading this paper, try to focus on the following questions:

• What is physical and logical data independence?
• Briefly discuss physical and logical data independence in IMS, Codasyl, and the relational model.

Lecture notes:

• lecture2.pdf