[Qgis-user] to extract attribute for linking to shape, but making operations

[Schroeder Natalia]

Hello,

My question is the following. I have a shape of offices in a building, 
with its corresponding office code, and secondly, I have a database of a 
survey of several individual responses (per person). I need to extract 
data from the survey in order to link them to the office shape. For 
example, a survey question was to ask people to identify the office 
(with the corresponding code) he/she occupies. As a result, people who 
occupy the same office, responded with the same code. I want to link 
that with the shape, in order to have a count of persons who are sharing 
the same office. I am clear? But I can not find a tool that 'counts 
(summarizes)' how many people responded with the same code, and add it 
as a column of the shape.
Thanks in advance!
Natalia

-- 
Natalia M. Schroeder
Laboratorio de Interacciones Ecológicas (LIE)
Instituto Argentino de Investigaciones de las Zonas Áridas (IADIZA), CONICET
CC 507, CP 5500, Mendoza, Argentina.
TE: +54-261-5244166
http://personal.mendoza-conicet.gob.ar/natalias/