Anthony Masinton wrote:
> I would like to combine data from different rows in one column into one
> row.
>
> I have two tables: 'locations' containing a dozen records about cities
> and their geographic coodinates - the other table,'testators', contains
> several hundred records referring to wills (each will is given a unique
> number) made by people in each of the towns in the locations table.
>
> I would like to query both tables so that a table is produced that has
> one row for each of the dozen cities and in each row is the name of the
> city, its coordinates and then a column containing all of the wills
> (i.e. the unique identifying number of each) from that city.
You'll want a custom aggregate (like sum()). See the link below for an
example of how to accumulate to an array.
http://www.postgresql.org/docs/8.2/static/xaggr.html
--
Richard Huxton
Archonet Ltd