Please write these statements for (i), (ii) and (iii) using the data and tables I've presented. Similar to how you answered (iv), (v) and (vi)

Are variables, decision structures, and loops used in other programming languages? How are the PL/SQL data types similar or different from variable types used in other languages?

Why would you assume that two select statements from the same database are consistent?

The order of operands is significant in EXCEPT (MINUS) queries but is irrelevant in UNION queries?

Task B.  Import the data shown in pictures into the two tables created.

Under what circumstances would it be reasonable to assume that two select statements from the same database are consistent with one another?

I need the references for the answers

Composite main keys have prospective keys.

C sharp Table: Student (the headers are the field names in the Students table) StudentID Name Age Gender ProgramID 791 Stephanie Brown 19 Female BCS 236 Shannon Dawn 25 Female BA 618 Geoff Berg 24 Male ARET 256 Andrew Schilling 22 Male BSC 902 Gary Sang 23 Male DAAD Note: There is a StudentDataSet with a Student table, a StudentTableAdapter, a StudentBindingSource, and a StudentDataGridView control on the form.Note: There is an Average query, named Average, that returns the average age of the student from the Student table.Note: There is also Max query, named Highest, that returns the highest age of the student from the Student table.Write the code you would place in the AverageButton click event on your form to call the Average query and the Highest query and display in a DifferenceLabel, the difference between the highest age of a student and the average age.