question for pl/sql

[grace_limi]

Hi

I am beginner and newcommer here, anybody can give answer for the following question?

Thanks,
Grace


Which of the following statements regarding column subqueires is true?

a. A pair wise comparision produces a cross product.
b. A non-pair wise comparision produces a cross product.
c. In a pair wise query, the values returned from the subquery are compared individually to the value in the outer query.

[fafarooqui]

Hi Grace,
according to me the correct answer is b..
coz cartisian product is a non pair wise product which multiplies all rows of a column to all rows of another column ..
take care

[grace_limi]

Hi Faraz,

Thanks & Regards,
Grace