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
edited Jan 11 at 23:28
Evan Carroll
31.9k968219
asked Jan 11 at 22:46
delkovdelkov
626
add a comment |
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
edited Jan 11 at 23:28
Evan Carroll
31.9k968219
asked Jan 11 at 22:46
delkovdelkov
626
This has nothing to do with spatial, or geojson.
– Evan Carroll
Jan 11 at 23:21
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'sST_ToGeoJSON
– Evan Carroll
Jan 11 at 23:29
I have an ability to save them like Postgis geom::point, can u provide this solution also?
– delkov
Jan 11 at 23:36
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
Jan 11 at 23:44
add a comment |
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
edited Jan 11 at 23:28
Evan Carroll
31.9k968219
asked Jan 11 at 22:46
delkovdelkov
626
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
edited Jan 11 at 23:28
Evan Carroll
31.9k968219
asked Jan 11 at 22:46
delkovdelkov
626
edited Jan 11 at 23:28
Evan Carroll
31.9k968219
asked Jan 11 at 22:46
delkovdelkov
626
edited Jan 11 at 23:28
Evan Carroll
31.9k968219
edited Jan 11 at 23:28
Evan Carroll
31.9k968219
edited Jan 11 at 23:28
Evan Carroll
31.9k968219
31.9k968219
asked Jan 11 at 22:46
delkovdelkov
626
asked Jan 11 at 22:46
delkovdelkov
626
asked Jan 11 at 22:46
delkovdelkov
626
626
This has nothing to do with spatial, or geojson.
– Evan Carroll
Jan 11 at 23:21
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'sST_ToGeoJSON
– Evan Carroll
Jan 11 at 23:29
I have an ability to save them like Postgis geom::point, can u provide this solution also?
– delkov
Jan 11 at 23:36
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
Jan 11 at 23:44
add a comment |
This has nothing to do with spatial, or geojson.
– Evan Carroll
Jan 11 at 23:21
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'sST_ToGeoJSON
– Evan Carroll
Jan 11 at 23:29
I have an ability to save them like Postgis geom::point, can u provide this solution also?
– delkov
Jan 11 at 23:36
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
Jan 11 at 23:44
This has nothing to do with spatial, or geojson.
– Evan Carroll
Jan 11 at 23:21
This has nothing to do with spatial, or geojson.
– Evan Carroll
Jan 11 at 23:21
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
Jan 11 at 23:29
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
Jan 11 at 23:29
I have an ability to save them like Postgis geom::point, can u provide this solution also?
– delkov
Jan 11 at 23:36
I have an ability to save them like Postgis geom::point, can u provide this solution also?
– delkov
Jan 11 at 23:36
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
Jan 11 at 23:44
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
Jan 11 at 23:44
add a comment |
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;
answered Jan 11 at 23:28
Evan CarrollEvan Carroll
31.9k968219
add a comment |
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1 Answer
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1 Answer
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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;
answered Jan 11 at 23:28
Evan CarrollEvan Carroll
31.9k968219
add a comment |
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;
answered Jan 11 at 23:28
Evan CarrollEvan Carroll
31.9k968219
add a comment |
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;
answered Jan 11 at 23:28
Evan CarrollEvan Carroll
31.9k968219
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;
answered Jan 11 at 23:28
Evan CarrollEvan Carroll
31.9k968219
answered Jan 11 at 23:28
Evan CarrollEvan Carroll
31.9k968219
answered Jan 11 at 23:28
Evan CarrollEvan Carroll
31.9k968219
answered Jan 11 at 23:28
Evan CarrollEvan Carroll
31.9k968219
31.9k968219
add a comment |
add a comment |
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This has nothing to do with spatial, or geojson.
– Evan Carroll
Jan 11 at 23:21
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
Jan 11 at 23:29
I have an ability to save them like Postgis geom::point, can u provide this solution also?
– delkov
Jan 11 at 23:36
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
Jan 11 at 23:44