On Tue, Jan 02, 2007 at 12:33:14 -0700, Anthony Masinton <amasinton@xxxxxxxxx> 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. > > Is this possible and if so, how? Collapsing rows is done with aggregate functions. You can write a custom aggregate that collapses the wills for a particular city. How you do this depends on how you want to store the combined wills (e.g. array, text string).
