
see. dee. dee. key 12 niyam

code key baarah niyam edger aff dwara prastaavit terah niyamon (shoonya seey baarah taka) kaa ack samooh haye. koo. dee. dee., databases key liye sambandhparak model kaa ack agrani, jise yeh paribhaashit karane key liye design kiya gayaa haye kii databases prabandhan pranali seey kyaa aavashyak haye taaki ise "sambandhparak" maanaa jaa sakey.ee.ack sambandhparak databases prabandhan pranali (aar. dee. bee. aim. aiss.). inhen kabhi-kabhi "coded kii baarah aagyaaen" key roop mein sandarbhit kiya jaataa haye.
itihas.
see. oh. dee. ney mool roop seey 1970 mein niyamon koo nirdhaarit kiya, aur 1974 key ack sammelan patra mein unhein aur vikasit kiya. unakaa uddeshya mool sambandhparak databases kii drishti koo kamjor honey seey rokna thaa, kyonki databases vikretaon ney 1980 key dashak kii shuruat mein maujooda utpaadon koo ack sambandhparak libas key saath phir seey paik karane key liye hathapai kii thee. niyam 12 vishesh roop seey iss tarah kii sthiti kaa mukabala karane key liye banaaya gayaa thaa.
jabaki 1999 mein, ack paathyapustak mein kahaa gayaa thaa, "aajkal, adhikansh aar. dee. bee. aim. aiss.... pariksha paas karein. 2007 mein ack anya ney sujhaav diyaa kii "koee bhee databases pranali sabhi baarah niyamon kaa paalan naheen karati haye."swayam coded ney apani pustak" dha relational model forr databases managementah varjan 2 "mein sweekaar kiya kii unake 12 niyamon key mool sett kaa upayog motey antar key liye kiya jaa sakata haye, lekin unake relational model varjan 2 (rm/vee2) kii 333 visheshtaon kii aavashyakta ack maheen anaaj key antar key liye haye.
niyam.
niyam 0: "aadhar niyam": 
niyam 1: "soochana niyam":
niyam 2: "guaranteekrit pahunch niyam":
niyam 3: "shoonya moolyon kaa vyavasthit upchaar":
niyam 4: "sambandhaatmak model parr adharit gatishil online soochi":
niyam 5: "vyaapak detta upbhasha niyam":
niyam 6: "adyatan dekhane kaa niyam":
niyam 7: sambandhparak sanchaalan niyam/"uchch-stariya sammilit karane, adyatan karane aur hataane key liye sambhav":
niyam 8: "bhautik detta swatantrata":
niyam 9: "taarkik detta swatantrata":
niyam 10: "akhandata kii swatantrata":
niyam 11: "vitaran swatantrata":
niyam 12: "gair-avagya niyam":

