How to re-use result for SELECT, WHERE and ORDER BY clauses?

Question

The following query returns the venues near us (lat: 62.0, lon: 25.0) inside whose radius we fall in ordered by distance:

SELECT *, 
     earth_distance(ll_t         


        

Answer 1

While I use MS SQL Server primarily, I'm pretty sure PostgreSQL supports CTEs. Try something like:

WITH CTE_venues AS (
SELECT *, earth_distance(ll_to_earth(62.0, 25.0), ll_to_earth(lat, lon)) AS distance 
FROM venues 
)
SELECT *
FROM CTE_venues 
WHERE distance <= radius 
ORDER BY distance