Unique key

Unique key - minimal superkey in relational database management systems. Article “Unique key” in English Wikipedia has 16.6 points for quality (as of July 1, 2025). The article contains 4 references and 6 sections.

This article has the best quality in German Wikipedia. However, this article is the most popular in English version.

Since the creation of article “Unique key”, its content was written by 145 registered users of English Wikipedia and edited by 389 registered Wikipedia users in all languages.

The article is cited 142 times in English Wikipedia and cited 550 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #22937 in January 2013
• Global: #15705 in July 2003

The highest popularity rank from 2008:

• Local (English): #53800 in October 2013
• Global: #55783 in November 2009

There are 11 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	German (de) Schlüssel (Datenbank)		21.5711
2	English (en) Unique key		16.5676
3	Russian (ru) Уникальный ключ		14.772
4	Ukrainian (uk) Унікальний ключ		14.335
5	Swedish (sv) Databasnyckel		9.831
6	French (fr) Clé (structure de données)		5.4751
7	Norwegian (no) Nøkkel (database)		5.3685
8	Czech (cs) Klíč (databáze)		4.4159
9	Korean (ko) 유일 키		2.225
10	Italian (it) Chiave (basi di dati)		1.8844

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "Unique key" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Unique key		1 438 714
2	German (de) Schlüssel (Datenbank)		1 089 392
3	Japanese (ja) 一意性制約		106 802
4	Norwegian (no) Nøkkel (database)		66 153
5	Italian (it) Chiave (basi di dati)		41 322
6	Swedish (sv) Databasnyckel		32 660
7	French (fr) Clé (structure de données)		27 678
8	Ukrainian (uk) Унікальний ключ		10 509
9	Czech (cs) Klíč (databáze)		8 215
10	Russian (ru) Уникальный ключ		6 802

More...

The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Unique key" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) Unique key		2 044
2	German (de) Schlüssel (Datenbank)		651
3	Japanese (ja) 一意性制約		69
4	Russian (ru) Уникальный ключ		52
5	Italian (it) Chiave (basi di dati)		49
6	French (fr) Clé (structure de données)		41
7	Norwegian (no) Nøkkel (database)		37
8	Swedish (sv) Databasnyckel		23
9	Czech (cs) Klíč (databáze)		22
10	Korean (ko) 유일 키		21

More...

The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Unique key" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	German (de) Schlüssel (Datenbank)		156
2	English (en) Unique key		145
3	Norwegian (no) Nøkkel (database)		30
4	French (fr) Clé (structure de données)		19
5	Swedish (sv) Databasnyckel		10
6	Japanese (ja) 一意性制約		9
7	Italian (it) Chiave (basi di dati)		7
8	Ukrainian (uk) Унікальний ключ		5
9	Czech (cs) Klíč (databáze)		3
10	Russian (ru) Уникальный ключ		3

More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Unique key" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	Czech (cs) Klíč (databáze)		0
2	German (de) Schlüssel (Datenbank)		0
3	English (en) Unique key		0
4	French (fr) Clé (structure de données)		0
5	Italian (it) Chiave (basi di dati)		0
6	Japanese (ja) 一意性制約		0
7	Korean (ko) 유일 키		0
8	Norwegian (no) Nøkkel (database)		0
9	Russian (ru) Уникальный ключ		0
10	Swedish (sv) Databasnyckel		0

More...

The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Unique key" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Unique key		142
2	German (de) Schlüssel (Datenbank)		122
3	Norwegian (no) Nøkkel (database)		94
4	Ukrainian (uk) Унікальний ключ		72
5	French (fr) Clé (structure de données)		57
6	Japanese (ja) 一意性制約		26
7	Swedish (sv) Databasnyckel		17
8	Korean (ko) 유일 키		9
9	Czech (cs) Klíč (databáze)		4
10	Italian (it) Chiave (basi di dati)		4

More...

#	Language	Value
cs	Czech Klíč (databáze)
de	German Schlüssel (Datenbank)
en	English Unique key
fr	French Clé (structure de données)
it	Italian Chiave (basi di dati)
ja	Japanese 一意性制約
ko	Korean 유일 키
no	Norwegian Nøkkel (database)
ru	Russian Уникальный ключ
sv	Swedish Databasnyckel
uk	Ukrainian Унікальний ключ

Best Rank

English: #53800 10.2013

Global: #55783 11.2009

Best Rank

English: #22937 01.2013

Global: #15705 07.2003

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The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information