Объединение условий

Листинг 5.14. Объединение условий с использованием логических операторов

booktown=# SELECT isbn, cost, stock

booktown-# FROM stock

booktown-# WHERE cost >
30

booktown-# OR stock = 0:

Isbn cost | stock

0394900014 23.00 | 0

044100590X | 36.00 | 89

0451198492 | 36.00 | 0

0451457994 17.00 j 0 (4 rows)

booktown=# SELECT Isbn, cost, stock

booktown-# FROM stock

booktown-# WHERE cost >
30

booktown-# AND stock = 0;

Isbn | cost stock

0451198492 36.00 0

(1 row)