JSON Query in PostgreSQL












2















I have a table:



CREATE TABLE foo (id,lat,lon)

AS VALUES

  ( 1, 34, 45 ),

  ( 1, 45, 56 ),

  ( 2, 56, 67 ),

  ( 2, 58, 64 );


How can I get JSON like that:



{"1":[[34,45],[45,56]], "2":[[56,67],[58,64]]}





postgresql json







share|improve this question

























  • This has nothing to do with spatial, or geojson.

    – Evan Carroll
    3 hours ago











  • The spatial solution is actually much easier, but then you don't store points in a table. You store either lines or MULTIPOINTs. and you can use PostGIS's ST_ToGeoJSON

    – Evan Carroll
    2 hours ago













  • I have an ability to save them like Postgis geom::point, can u provide this solution also?

    – delkov
    2 hours ago











  • no, it's a totally different question that requires you store a GEOGRAPHY or GEOMETRY type on the table, install the PostGIS extension, save all your points in a totally different format, and then query the table differently. It would take 25 pages for me to go over that setup and explain what's happening. I do however HIGHLY suggest the PostGIS in Action book if you're looking for direction and you want to learn GIS.

    – Evan Carroll
    2 hours ago
















2















I have a table:



CREATE TABLE foo (id,lat,lon)

AS VALUES

  ( 1, 34, 45 ),

  ( 1, 45, 56 ),

  ( 2, 56, 67 ),

  ( 2, 58, 64 );


How can I get JSON like that:



{"1":[[34,45],[45,56]], "2":[[56,67],[58,64]]}





postgresql json







share|improve this question

























  • This has nothing to do with spatial, or geojson.

    – Evan Carroll
    3 hours ago











  • The spatial solution is actually much easier, but then you don't store points in a table. You store either lines or MULTIPOINTs. and you can use PostGIS's ST_ToGeoJSON

    – Evan Carroll
    2 hours ago













  • I have an ability to save them like Postgis geom::point, can u provide this solution also?

    – delkov
    2 hours ago











  • no, it's a totally different question that requires you store a GEOGRAPHY or GEOMETRY type on the table, install the PostGIS extension, save all your points in a totally different format, and then query the table differently. It would take 25 pages for me to go over that setup and explain what's happening. I do however HIGHLY suggest the PostGIS in Action book if you're looking for direction and you want to learn GIS.

    – Evan Carroll
    2 hours ago














2












2








2


1






I have a table:



CREATE TABLE foo (id,lat,lon)

AS VALUES

  ( 1, 34, 45 ),

  ( 1, 45, 56 ),

  ( 2, 56, 67 ),

  ( 2, 58, 64 );


How can I get JSON like that:



{"1":[[34,45],[45,56]], "2":[[56,67],[58,64]]}





postgresql json







share|improve this question
















I have a table:



CREATE TABLE foo (id,lat,lon)

AS VALUES

  ( 1, 34, 45 ),

  ( 1, 45, 56 ),

  ( 2, 56, 67 ),

  ( 2, 58, 64 );


How can I get JSON like that:



{"1":[[34,45],[45,56]], "2":[[56,67],[58,64]]}





postgresql json




postgresql json






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 hours ago









Evan Carroll

31.3k865208




31.3k865208










asked 3 hours ago









delkovdelkov

576




576













  • This has nothing to do with spatial, or geojson.

    – Evan Carroll
    3 hours ago











  • The spatial solution is actually much easier, but then you don't store points in a table. You store either lines or MULTIPOINTs. and you can use PostGIS's ST_ToGeoJSON

    – Evan Carroll
    2 hours ago













  • I have an ability to save them like Postgis geom::point, can u provide this solution also?

    – delkov
    2 hours ago











  • no, it's a totally different question that requires you store a GEOGRAPHY or GEOMETRY type on the table, install the PostGIS extension, save all your points in a totally different format, and then query the table differently. It would take 25 pages for me to go over that setup and explain what's happening. I do however HIGHLY suggest the PostGIS in Action book if you're looking for direction and you want to learn GIS.

    – Evan Carroll
    2 hours ago



















  • This has nothing to do with spatial, or geojson.

    – Evan Carroll
    3 hours ago











  • The spatial solution is actually much easier, but then you don't store points in a table. You store either lines or MULTIPOINTs. and you can use PostGIS's ST_ToGeoJSON

    – Evan Carroll
    2 hours ago













  • I have an ability to save them like Postgis geom::point, can u provide this solution also?

    – delkov
    2 hours ago











  • no, it's a totally different question that requires you store a GEOGRAPHY or GEOMETRY type on the table, install the PostGIS extension, save all your points in a totally different format, and then query the table differently. It would take 25 pages for me to go over that setup and explain what's happening. I do however HIGHLY suggest the PostGIS in Action book if you're looking for direction and you want to learn GIS.

    – Evan Carroll
    2 hours ago

















This has nothing to do with spatial, or geojson.

– Evan Carroll
3 hours ago





This has nothing to do with spatial, or geojson.

– Evan Carroll
3 hours ago













The spatial solution is actually much easier, but then you don't store points in a table. You store either lines or MULTIPOINTs. and you can use PostGIS's ST_ToGeoJSON

– Evan Carroll
2 hours ago







The spatial solution is actually much easier, but then you don't store points in a table. You store either lines or MULTIPOINTs. and you can use PostGIS's ST_ToGeoJSON

– Evan Carroll
2 hours ago















I have an ability to save them like Postgis geom::point, can u provide this solution also?

– delkov
2 hours ago





I have an ability to save them like Postgis geom::point, can u provide this solution also?

– delkov
2 hours ago













no, it's a totally different question that requires you store a GEOGRAPHY or GEOMETRY type on the table, install the PostGIS extension, save all your points in a totally different format, and then query the table differently. It would take 25 pages for me to go over that setup and explain what's happening. I do however HIGHLY suggest the PostGIS in Action book if you're looking for direction and you want to learn GIS.

– Evan Carroll
2 hours ago





no, it's a totally different question that requires you store a GEOGRAPHY or GEOMETRY type on the table, install the PostGIS extension, save all your points in a totally different format, and then query the table differently. It would take 25 pages for me to go over that setup and explain what's happening. I do however HIGHLY suggest the PostGIS in Action book if you're looking for direction and you want to learn GIS.

– Evan Carroll
2 hours ago










1 Answer
1






active

oldest

votes


















4














First you do something like this,



SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j

FROM foo

GROUP BY id;


That aggregates the values into an JSON Array. You get



 id |          j           

----+----------------------

  2 | [[56, 67], [58, 64]]

  1 | [[34, 45], [45, 56]]


From there you need to build an JSON Object..



SELECT jsonb_object_agg(id,j)

FROM (

  SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j

  FROM foo

  GROUP BY id

) AS t;





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    1 Answer
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    active

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    4














    First you do something like this,



    SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j
    
FROM foo
    
GROUP BY id;


    That aggregates the values into an JSON Array. You get



     id |          j           
    
----+----------------------
    
  2 | [[56, 67], [58, 64]]
    
  1 | [[34, 45], [45, 56]]


    From there you need to build an JSON Object..



    SELECT jsonb_object_agg(id,j)
    
FROM (
    
  SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j
    
  FROM foo
    
  GROUP BY id
    
) AS t;





    share|improve this answer




























      4














      First you do something like this,



      SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j
      
FROM foo
      
GROUP BY id;


      That aggregates the values into an JSON Array. You get



       id |          j           
      
----+----------------------
      
  2 | [[56, 67], [58, 64]]
      
  1 | [[34, 45], [45, 56]]


      From there you need to build an JSON Object..



      SELECT jsonb_object_agg(id,j)
      
FROM (
      
  SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j
      
  FROM foo
      
  GROUP BY id
      
) AS t;





      share|improve this answer


























        4












        4








        4







        First you do something like this,



        SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j
        
FROM foo
        
GROUP BY id;


        That aggregates the values into an JSON Array. You get



         id |          j           
        
----+----------------------
        
  2 | [[56, 67], [58, 64]]
        
  1 | [[34, 45], [45, 56]]


        From there you need to build an JSON Object..



        SELECT jsonb_object_agg(id,j)
        
FROM (
        
  SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j
        
  FROM foo
        
  GROUP BY id
        
) AS t;





        share|improve this answer













        First you do something like this,



        SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j
        
FROM foo
        
GROUP BY id;


        That aggregates the values into an JSON Array. You get



         id |          j           
        
----+----------------------
        
  2 | [[56, 67], [58, 64]]
        
  1 | [[34, 45], [45, 56]]


        From there you need to build an JSON Object..



        SELECT jsonb_object_agg(id,j)
        
FROM (
        
  SELECT id, jsonb_agg(jsonb_build_array(lat,lon)) AS j
        
  FROM foo
        
  GROUP BY id
        
) AS t;






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 2 hours ago









        Evan CarrollEvan Carroll

        31.3k865208




        31.3k865208






























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