April 2006
Intermediate to advanced
640 pages
16h 46m
English
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Chapter 5. Joins and Set Operations
This chapter covers joins and set operations—their logical aspects as well as their physical/performance aspects. I’ll demonstrate practical applications for each type of join and set operation. I have used the ANSI SQL terminology to categorize the elements of the language that I’ll cover here. Joins (CROSS, INNER, OUTER) refer to horizontal operations (loosely speaking) between tables, while set operations (UNION, EXCEPT, INTERSECT) refer to vertical operations between tables.
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