updated: 2022-01-23_12:32:31-05:00

Project

  • to project (v)

  • an unary operation that returns its argument relation, with certain attributes left out

  • Notation:

    • Pasted image 20210907142350

  • Returns the relation of k columns obtained by erasing the columns not listed

  • duplicate rows removed, since relations are sets

  • Pasted image 20210907142516