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.
An advertising firm manages the following tables:
The first table specifies a list of public holidays. Each row specifies the holiday’s serial number, start date, and end date:
CREATE TABLE Holidays (HID int identity(1,1), HStart date, HEnd date) GO
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