PK meaning in Military and Defence ?

Answer: What is Primary Key mean?

In the relational model of databases, a primary key is a specific choice of a minimal set of attributes (columns) that uniquely specify a tuple (row) in a relation (table). Informally, a primary key is "which attributes identify a record," and in simple cases constitute a single attribute: a unique ID. More formally, a primary key is a choice of candidate key (a minimal superkey); any other candidate key is an alternate key.

A primary key may consist of real-world observables, in which case it is called a natural key, while an attribute created to function as a key and not used for identification outside the database is called a surrogate key. For example, for a database of people (of a given nationality), time and location of birth could be a natural key. National identification number is another example of an attribute that may be used as a natural key.

reference

Full Form	Category
Point kilométrique	Academic & Science
Pure Kush	Academic & Science
Paul Kohler	Academic & Science
PetroKazakhstan	Business
Parker Kalon	Business
Pink Kipper Publishing company	Business
Covalent Disassociation Constant	Chemistry
Pre-Kindergarten	Community
Perrin Kaplan, Vice-President of Nintendo	Community
Presbyterian Kids	Community
Perfect Kid	Community
Pierre Karsmakers, bike racer	Community
Promise Keepers	Community
Pre-Kindergartner	Community
Proteus Keyboard	Community
Paul Kocher	Community
Pastor Kid	Community
Poetic Kindness	Community
Paul Kelly	Community
Phil Katz, computer programmer, inventor of PKWare	Community
Player Kill/Killer/Killing	Computing
Pakistan (TLD)	Computing
Public Key	Computing
Property Key	Computing
Playoff Kingpin	Computing
Tex Dvi Driver Packed Bitmap Font File	File Type
Psycho Kitty	General
Pretty Krappy	General
Phrozen Keep	General
Patty Kathryn	General
Potato Klan	General
Prozen Knights	General
Psycho Kinetic	General
Philip Kenwood	General
Pretty Kitty	General
Philip Kennard	General
Psycho Kinesis	General
Prozac Kitty	General
Phil Katz	General
Pink	General
Powerful Kings	General
Popular Kid	General
Purr Kitty	General
Please Killme	General
Paul Kim	General
Pulse Kulture	General
Pimp King	General
Point Kilometer	General
Power Kilns	General
Phillip Katz	General
Pogger King	General
Platyrhynchos Kineticus	General
Programmatic Kid	General
Panda King	General
Partheeban Kandasamy	General
Peninjauan Kembali	General
Perfect Khan	General
Paradise Kiss	General
Perfectionist Keeda	General
Portable Kitchen	General
Priority Kill	General
Persian Kitty	General
Palia Kameni	General
Personalny Komp	General
Plank Kettner	General
Paung Ku	General
Product Knowledge	General
Pikachu Killer	General
Pig Kisser	General
Police Kitty	General
Paul Karl	General
People Killer	Governmental
PeaceKeeper	Governmental
Posse Killers	Governmental
Proof of Knowledge	Governmental
Periodically Kooky	Governmental
PAKNI	Indian Railway Station
PourKoi	International
Posta Kutusu	International
Professional Knowledge	Jobs
Peck	Measurement Unit
Phenylketonurics	Medical
Pyruvate Kinase	Medical
Penetrating Keratoplasty	Medical
PharmacoKinetics	Medical
PharmacoKinetic	Medical
Peacekeeping	Military and Defence
Potato King	Military and Defence
Peacekeeper Missile	Military and Defence
Primary Key	Military and Defence
Probability of Kill	Military and Defence
PeeKay	News & Entertainment
Parking	Real Estate
Possum Kingdom Lake	Regional
Port Kembla, New South Wales, Australia	Regional
Petropavlovsk-Kamchatskyia, Kamchatka Krai, Russia	Regional
Peak	Space Science
Platyrhynchos Kineticus (computer Game)	Sports
Parkour (running Sport Originating In France)	Sports
Personality Kill	Sports
Philippino Kickboxing	Sports
Penalty Kick	Sports
Player Killing	Sports
Player Kill	Sports
Penalty King	Sports
Player Killer	Sports
Number of Players Killed	Sports
Punch Kit	Sports
Penalty Killing	Sports & Games