Write the SQL code to generate the total hours worked and the total charges made to all projects. The results should be the same as those shown in Figure.
Answer to relevant QuestionsGenerate a listing of all purchases made by the customers, using the output shown in Figure P7.28 as your guide.Write a query to produce the number of invoices and the total purchase amounts by customer, using the output shown in Figure P7.35 as your guide.Write a query to display the brand ID, brand name, brand type, and average price of products for the brand that has the largest average productprice.Write a query to display the employee number, first name, last name, and largest salary amount for each employee in department 200. Sort the output by largest salary in descendingorder.The relational set operators UNION, INTERSECT, and MINUS work properly only if the relations are union-compatible. What does union-compatible mean, and how would you check for this condition?
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