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SQL Problems and solutions
S. I. Moiseenko
06:20
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Intersect and Except
FIRST_VALUE and LAST_VALUE functions
Exercise #16 (tips and solutions)
Exercise #15 (tips and solutions)
Exercise #11 (tips and solutions)
Exercise #10 (tips and solutions)
Exercise #28
Exercise 3 (rating)
Exercise #16
Exercise #15
обменять с iota
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Проектирование трубы для индивидуального застройщика
Links
sqlbooks.ru
Books and articles on SQL and databases
valentinnikotin.com
Valentin Nikotin's blog: Oracle SQL and PL/SQL.
cooler-online.com (cooler-online.ru)
Cooler - online computer tech dedicated project with ten years history
deskbright.com
SQL Interview Questions