Hi,
I have two tables: establishment which contains these columns: id, name, longitude, latitude, geom (Geometric column)
Product contains: id, name, establishment_id
First of all I want to select the establishment within a radius.
I run this query:
from establishment as e, establishment as e1
and ST_DWithin(geom, ST_MakePoint(e1.longitude, e1.latitude)::geography, 1000)
The result of this query returns all the establishment within a radius 1KM from from a given establishment which has an id = 1.
After that I want to get the product's name of each establishment from the query's result.
Is there an other optimized solution to make a query such this:
select * from (
from establishment as e, establishment as e1
and ST_DWithin(geom, ST_MakePoint(e1.longitude, e1.latitude)::geography, 1000)) as tmp inner join product as p on p.establishment_id =
tmp.id
