primary key
n=4
Primary Key Is Like A Father In House
a: Primary key ~
b: a father in house
What: "a primary key is like a father in house, like only one but
there may be a lot of childs just like columns." This is good. If there are children in a house, there must be a father. If there are rows in a table they must have a primary key, otherwise they are orphan rows.
Useful?
Writer: Ashis Kumar Jena
LCC: QA
Where:
Date: Dec 16 2011 7:15 PM
# 1569 Critique Analogy
Primary Key
a: Primary key ~
b: social secruity number
What: In fact, the social security number is a primary key. By definition a primary key uniquely identifies a record in a database. This idea was necessary before electronic databases so as to keep track of individuals and their personal information. There are many unique identifiers that most people should be familiar with: license plates, finger prints and retinal scans all convey uniqueness.
Useful?
Writer: LucretiaGermanica
LCC: QA
Where: Reference Link Has Evaporated
Date: Dec 16 2011 7:53 PM
# 1570 Critique Analogy
Primary Keys As Fingerprints
a: Primary key ~
b: fingerprint
What: "Primary Keys are like fingerprints: there are no two human beings with identical fingerprints."
Useful?
Writer: Not Stated
LCC: QA
Where: Reference Link Has Evaporated
Date: Dec 16 2011 7:32 PM
# 1572 Critique Analogy
A Primary-key Is Like A License Plate
a: A primary key ~
b: the license plate on a car
What: "A primary-key is like the license
plate on a car. It uniquely identifies a record."
Useful?
Writer: Not Stated
LCC: QA
Where:
Date: Dec 16 2011 7:28 PM
# 1571 Critique Analogy
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.