/* Query 5. For products that meet both (a) and (b) conditions of Query 4, if we rank them in Z -> A order of ProductID, i.e., from largest to smallest and the one with the largest ProductID will be ranked as #1. Based on this rank, find only four of them which are ranked #8, #9, #10 and #11. The output should contains same four columns as in Query 4. Hint: extend ORDER BY with OFFSET. */

Here is Query 4:

/* Query 4. Find products that satisfy BOTH conditions below: (a) Its unit price must NOT below $22. (b) Its category ID is 4 or 7 or 8. If its category ID is 1 or 3, then it must have at least 40 units in stock.

Display their ProductID, UnitPrice, CategoryID, and UnitsInStock. The output should be sorted by CategoryID in A -> Z order (i.e., from smallest to largest). For those with the same CategoryID, the one with the highest UnitPrice should be displayed first.

Hint 1: a compound condition with AND, OR, NOT. Hint 2: correct output has 16 products. */ SELECT ProductID, UnitPrice, CategoryID, UnitsInStock FROM Products WHERE UnitPrice>=22 AND (CategoryID in (4,7,8) OR (CategoryID in (1,3) AND UnitsInStock >= 40)) ORDER BY CategoryID ASC, UnitPrice DESC;