Related Questions

Consider the following three relations in a relational database. Employee(eId, Name), Brand(bId, bName), Own(eId, bId) Which of the following relational algebra expressions return the set of eIds who own all the brands? 
Which one of the following is used to define the structure of the relation, deleting relations and relating schemas?
Metadata about the relations are stored in ________
_________ can be applied to the metadata or to an active session and the metadata.