=centercr
@ []Query Q 4.6.1: Find the name and salary histories of employees
whose date-of-birth was after 1/1/56.
Answer: ``DI's'' entire Name and Salary history
Category: (Projected, Element,Derived) / (Ordering, Event, User-defined) /
=centercr
@ []Query Q 4.6.2: Find the name and salary histories of employees
who were called ``Ed'' after 1/1/88.
Answer: ``Empty Answer''
Category: (Projected, Element, Derived) / (Ordering, Event, User-Defined) /
=centercr
@ []Query Q 4.6.3: Find the name and salary histories since their latest pay raise
of employees whose latest pay raise was in 1985.
Answer: ``ED's Name and Salary history from 2/1/85 onwards''
Category: (Projected, Element, Derived) / (Containment, Event, Explicit) /
=centercr
@ []Query Q 4.6.4: Find the name and salary histories
of employees whose latest pay raise occurred
after the date-of-birth of every other employee.
Answer: ``Both DI's and ED's enitre Name and Salary history
Category: (Projected, Element, Derived) / (Ordering, Event, User-Defined) /
=centercr
@ []Query Q 4.6.5: Find the name and salary histories
of employees whose latest pay raise occurred
on the date-of-birth of some other employee.
Answer: ``Empty Answer''
Category: (Projected, Element, Derived) / (Containment, Event, User-Defined) /
=centercr
@ []Query Q 4.6.6: Who and when had at least the skills that Di currently has?
Answer: ``None''
Category: (Projected, Element, Derived) / (Containment, Event, Explicit) / (=, Constant)