The exam will be 120 minutes long. It is closed book and closed notes . Questions will be both multiple-choice and full text questions. These topics have already been covered in the homework assignments. Topics covered will be:

• Virtual Data Integration

  • Given a set of views encoded as GLAV or LAV mappings, produce a maximally contained rewritings for a query over the global schema using the bucket or inverse-rules algorithm.

• Data Warehousing

  • Write SQL queries using the generalized grouping and windowed aggregation (analytical function) features we have discussed in class.
  • Answer basic multiple choice questions about the multidimensional datamodel and its abstract operations (drill-down, roll-up, …).

• Provenance

  • Answer multiple choice questions about provenance models, e.g., insensitivity to query rewrite

  • Know how to determine the provenance of a simple query according to one of the following provenance models.

    • The 3 variants of Why-provenance: the set of witnesses, Why-provenance, and minimal Why-provenance.
    • How-provenance (provenance polynomials).

Solutions: Solutions are available here