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combinación única de variables a:

09:42 Nov 3, 2014
This question was closed without grading. Reason: Other

Spanish to English translations [PRO]
Social Sciences - Mathematics & Statistics / Administrative datasets -
Spanish term or phrase: combinación única de variables a:
This is my last question from this project! I don't understand what the"a"+colon is about.

Las variables clave de identificación contienen valores que permiten identificar unívocamente cada caso del registro. Las combinaciones únicas de determinadas variables son uniones de datos de dos o más variables (variables que por sí solas no permiten realizar identificaciones unívocas de casos) que juntos permiten identificar unívocamente los casos del registro. Por ejemplo, si consideramos el registro de desayunos escolares, se podría encontrar como **combinación única de variables a: ** código de escuela + número de desayuno entregado (bajo el supuesto de que el número de desayuno entregado es un código secuencial que no se repite dentro de la misma escuela, pero que se puede repetir en otras escuelas, sino sería clave de identificación).
Muriel Vasconcellos
United States
Local time: 23:31


Summary of answers provided
2assignment / definition
DLyons


  

Answers


16 mins   confidence: Answerer confidence 2/5Answerer confidence 2/5
assignment / definition


Explanation:
The "+" is clearcut this refers to concatenation (or an equivalent operation) of partial keys to form a unique compound key
http://en.wikipedia.org/wiki/Compound_key

That key is being named "a" and it seems most likely it's being assigned a value. The ALGOL family of languages use ":=" for assignment e.g. to give x a value 1 you write "x:=1".

So might there be a missing "=" sign here?

DLyons
Ireland
Local time: 07:31
Specializes in field
Native speaker of: English
PRO pts in category: 263
Notes to answerer
Asker: Thanks Donal, It does make sense if "the concatenation" is inserted before "a:" I'm going to go with that and query the author about the insertion and the missing equals-sign.

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