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 specifies various messages sent between users in an organization. Each row contains the message number, the sending date, and the message’s content, sorted by the sending date:
CREATE TABLE [messages] (message_id int identity(1,1), message_date date, message_context varchar(25)) GO