secondo/Data/Databases/cebit2006

This folder contains the following files:
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1. Database 'cebit2006' with objects:

   Name:        aussteller
   Schema:      ((Name text)(Ort string)(Halle string)(geoData region)(Stand string))
   Cardinality: 6402

   Name:        aussteller2
   Schema:      ((Name text)(Ort string)(Stand string))
   Cardinality: 6416

   Name:        aussteller3
   Schema:      ((Name text)(Land string(Ort string)(Halle int)(Stand string)(geoData region))
   Cardinality: 6373

   Name:        hallen
   Schema:      ((Name string)(geoData region))
   Cardinality: 33

   Name:        eingaenge
   Schema:      ((Name string)(geoData region))
   Cardinality: 12

   Name:        andereobj
   Schema:      ((Name string)(geoData region))
   Cardinality: 13

2. Categories file: 'cebit2006.cat'

3. Session file: 'cebit2006.ses'


How to work with the database:
=============================

Get the database file 'cebit2006' (its in the secondo-data repository)
and create a database with the same name.

Example Query:
=============

  1.  List all halls where you can find exhibitors from Brazil. 

  2.  How many brazilian exhibitors are in each of the halls, that were found ?

  3.  Show these halls graphically in the cebit map.

Hence the result should be a relation with schema:

((Halle string)(anz int)(geoData region))

Possible query (Executable Level):

query aussteller3 feed filter [.Land = "BR"] sortby[Halle asc] groupby[Halle; geoData: group feed extract[geoData], anz: group feed count] consume

Possible query ignoring condition 3 (SQL):

sql select [halle, count(*) as anz] from aussteller3 where land = "BR" groupby halle.

The file 'queryresult.png' shows the graphical result of this query.