V-day
It’s true that we don’t know what we’ve got until we lose it, but it’s also true that we don’t know what we’ve been missing until it arrives.
Kohaku River
Mới xem Spirited Away. Tuyệt vời. Tám sau.
//copy from imdb quote
Chihiro: Listen, Haku. I don’t remember it, but my mom told me… Once, when I was little, I fell into a river. She said they’d drained it and built things on top. But I’ve just remembered. The river was called… Its name was the Kohaku River. Your real name is Kohaku.
Haku: Chihiro, thank you. My real name is Nigihayami Kohaku Nushi.
Chihiro: Nigihayami?
Haku: Nigihayami Kohaku Nushi.
Chihiro: What a name. Sounds like a god.
Haku: I remember too, how you fell into me as a child. You had dropped your shoe.
Chihiro: Yes, you carried me to shallow water, Kohaku.
Chihiro: I’m so grateful!
3 Normal Forms in Relational Database Theory
I find this guide easiest to understand:
First normal form (no items appear more than once)
- each col must have a unique name
- order of rows and cols doesn’t matter
- each col must have a single data type
- no 2 rows can contain identical values
- each col must contain a single value
- cols cannot contain repeating groups
Second normal form (primary key determine value of other columns)
- in 1NF
- all non-key fields depend on all of the key fields
Third normal form (value not determined by any non-primary key)
- in 2NF
- contains no transitive dependencies (when one non-key field’s value depends on another non-key field’s value)
Source: from Beginning Database Design Solutions (Rod Stephens)
Tác giả Ngô Phan Lưu
Từ vnexpress mình mới biết đến cây bút Ngô Phan Lưu. Đang tìm đọc những bài viết của ông.
http://ngophanluu.blogspot.com/
Vâng, nó dễ quá nên chú mày yêu quá! Bởi ở đời, có ai yêu cái khó bao giờ. Cái khó người ta thích chinh phục để chiến thắng, nhưng người ta không yêu! Cũng thế, hoa Mua mọc cả rừng, nó chả ra gì, nên chú mày yêu điên khùng!”
.::. 