Be able to use a variety of commercial query languages (SQL, XQuery, SPARQL), both stand-alone and embeded in high-level programming languages. Know how relational algebra and relational calculus provide a basis for commercial query languages.
Understand performance issues and optimization strategies. This includes query rewriting, secondary storage characteristics, and access strategies.
Be able to design and develop relational database applications. This includes conceptual modeling and normalization theory.
Be familiar with some of the current challenges facing database professionals.