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SQL: Calculate distance between two points using coordinates

I’ve got a table with lat and lng coordnates, and need to add the distance into a new column called ‘distance’ in Bigquery.

table

start_lat end_lat start_lng end_lng
41.8964 41.9322 -87.661 -87.6586
41.9244 41.9306 -87.7154 -87.7238
41.903 41.8992 -87.6975 -87.6722

I haven’t a clue how to do it. I saw some examples, but simply couldn’t apply it into this case. Any tip?

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Answer

The ST_DISTANCE function will calculate the distance (in meters) between 2 points.

with my_data as (
  select 1 as trip_id, 41.8964 as start_lat, 41.9322 as end_lat, -87.661 as  start_lng, -87.6586 as end_lng union all
  select 2, 41., 41.9306, -87.7154, -87.7238
)
select trip_id, 
  ST_DISTANCE(ST_GEOGPOINT(start_lng, start_lat), ST_GEOGPOINT(end_lng, end_lat)) as distance_in_meters
from my_data

Output:

trip_id distance_in_meters
1 3985.735019583467
2 103480.52812005761
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