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.
A company operating an online payments system is developing a new product. To define tasks and timetables, the manager in charge of this development has created the following table:
CREATE TABLE ProductionPhases (phase_date date, phase_status varchar(25)) GO