Symbоls fоr Relаtiоnаl Algebrа Expressions and Other Symbols Symbols for relation schemas: R, S, T Symbols for relations: R, S, T, ∅ Symbols for Relational Algebra operators: ∪, -, π, σ, ρ, ⨯, ∩, Δ, ÷, ⨝, ⟗, ⟕, ⟖, ⋉, ⋊, ▷ Symbols for logical connectives: ∧, ∨, ¬ Symbols for comparison predicates: , =, ≤, ≥, ≠ Symbols for set-theoretical operations: ∈, ∉, ⊆, ⊂, ⊇, ⊃ Other mathematical symbols: ⊥, ⋅, ∃, ∀, ∘, ←, → All names (for example, for relations and attributes) should be written in normal font (no italics) to increase readability. All symbols should be surrounded by blanks to increase readability. Database schema Animals(AnimalID, Species, Name, DateOfBirth, Gender, HabitatID, Origin, ArrivalDate, DietType)Habitats(HabitatID, Type, Size, Location, CleaningSchedule, EnvironmentControlSettings)ZooStaff(StaffID, FirstName, LastName, Role, Department, HireDate, Qualifications, ContactNumber)AnimalHealthCare(StaffID, AnimalID, CareDate, Treatment, Notes)VisitorTours(TourID, Date, Time, GuideStaffID, RouteDescription, Theme, Duration, GroupSize)Maintenance(MaintenanceID, HabitatID, Description, Year, Date, StaffID, Status, Priority)ConservationPrograms(ProgramID, Name, Description, StartDate, EndDate, ResponsibleStaffID)ZooEvents(EventID, Name, Date, Time, Location, OrganizerStaffID, TargetAudience, Budget) Query Find the names of staff members who maintained habitats with "Tropical Rainforest" environment control settings last year.
Fоr Hоnоlork online exаms, а webcаm is required and it's important to place your webcam in the right position, so your exam is valid. A workspace scan is required and a room scan is not required. Sit directly in front of your webcam Adjust your camera so that your head is on the top half of the profile view when you are looking at your monitor (It's okay when you look down and work on the questions) Perform a workspace scan to show your keyboard and workspace NOW If you are using an internal webcam, use a mirror or phone camera to perform a workspace scan. Put your phone away and do not leave it on your workspace after the scan. If you are using an external webcam, take your camera to perform a workspace scan. Avoid strong back-lighting Check your Honorlock recording screen. Do you place your camera in the right position and do you perform the workspace scan?