Hi,
Following up on Tom's suggestion that Chapters 2 and 3 of the
tutorial likewise lack introductory paragraphs, I've attached a
patch that adds them.
Chapter 2 (The SQL Language) gets a paragraph summarizing tables,
queries, joins, aggregates, and data modification.
Chapter 3 (Advanced Features) gets a paragraph summarizing views,
foreign keys, transactions, window functions, and inheritance.
Regards,
Dapeng Wang
