help for definition of BCNF and MVFD - 未名空间MITBBS历史存档

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help for definition of BCNF and MVFD

help for definition of BCNF and MVFD# Database - 数据库

b*x2001-03-03 08:03

1 楼

someone please give me a hand bah.
My textbook really sucks. I even cant find exact definition of these
two terms but i have to prepare the answer for the midterm next monday.

Thanks

a*o2001-03-03 08:03

2 楼

BCNF should be
if
A --> B
then
A is a key or super key.
Don't know MVFD though.

【在 b**x 的大作中提到】

: someone please give me a hand bah.
: My textbook really sucks. I even cant find exact definition of these
: two terms but i have to prepare the answer for the midterm next monday.
:
: Thanks