This advanced SQL exercise is part of the book: Advanced SQL – Practical Techniques and Use-Cases, which includes 100 day-to-day SQL challenges (and solutions), need-to-know advanced features, and key concepts.
Given a table that displays the office maintenance costs of a certain company. The table specifies the city where the office is located, the monthly billing date, and the various costs (cleaning, equipment, and electricity).
CREATE TABLE OfficeCosts ( OfficeCity VARCHAR(100) ,BillDate DATETIME ,Cleaning DECIMAL(8,3) ,Equipment DECIMAL(8,3) ,Electricity DECIMAL(8,3) ) GO