SQL query to get conflicting values in JSONB from a group

SQL query to get conflicting values in JSONB from a group

By : wildewutz
Date : October 16 2020, 08:10 PM
it should still fix some issue There are at least two solid approaches, depending on how complex you want to get and how numerous and/or dynamic the keys are. The first is very straightforward:
code :
select location_id
from report
where report_type = 'R'
group by location_id
having count(distinct data->'key1') > 1 
  or count(distinct data->'key2') > 1
  or count(distinct data->'key3') > 1
--note that we also need distinct on location id to return one row per location
select distinct on(location_id) location_id
 --jsonb_each returns the key, value pairs with value in type JSON (or JSONB) so the value field can handle integers, text, arrays, etc 
from report, jsonb_each(data)
where report_type = 'R'
 and key in('key1', 'key2', 'key3')
group by location_id, key
having count(distinct value) > 1
order by location_id

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Postgres JSONB: query values in JSON array

Postgres JSONB: query values in JSON array

By : user4196633
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Postgres documentation regarding json is really great. As for search query approach it's important to know that ->> returns text and -> returns json(b).
Query can be the following:
code :
select * from json js,jsonb_array_elements(data->'arrayAttribute') as array_element  
where (js.data->>'attributeA')::integer = 1 
and js.data->>'attributeB' = 'Foo' 
and (array_element->>'attributeC')::integer >= (100-5) 
and (array_element->>'attributeC')::integer <= (100+5);
SELECT * FROM json js,jsonb_extract_path(data,'arrayAttribute') AS entireArray 
WHERE (entireArray -> 0 ->> 'attributeC')::integer = 95
AND (entireArray -> 1 ->> 'attributeC')::integer = 105;
How to query an array of values within a JSONB field dictionary?

How to query an array of values within a JSONB field dictionary?

By : jm7296
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I'm not sure if there's any better way -- that honestly looks pretty straightforward to me.
As for indexing, there are a couple things you can do.
code :
CREATE INDEX ON things ( my_column -> 'a' );
CREATE INDEX ON things (my_column)
  WHERE my_column -> 'a' IS NULL OR NOT
    my_column -> 'a' ? 'X';
Rails PostgreSQL jsonb GROUP BY query on internal dynamic keys

Rails PostgreSQL jsonb GROUP BY query on internal dynamic keys

By : Pretty5225
Date : March 29 2020, 07:55 AM
To fix the issue you can do As a matter of fact... you are able to make it work! Do the following query:
code :
query = <<-SQL 
  select errors.types, COUNT(errors.types)
  from (select jsonb_object_keys(error_messages) as types from api_responses) errors
  group by errors.types

your_result = API::Response.find_by_sql(query)
Query for array values within jsonb column

Query for array values within jsonb column

By : user3426831
Date : March 29 2020, 07:55 AM
To fix this issue I have a jsonb column called chores in my work table with data looking something like this: , You need to unnest the array:
code :
select w.*
from "work" w
where exists (select *
              from jsonb_array_elements(w.chores) as t(task)
              where t.task ->> 'task" = 'feed_dog');
select *
from "work" w
where jsonb_path_exists(w.chores, '$[*] ? (@.task == "feed_dog")')
How to query the values in a jsonb column in PostgreSQL?

How to query the values in a jsonb column in PostgreSQL?

By : user3542303
Date : March 29 2020, 07:55 AM
it helps some times Given a jsonb column called pairs with data such as the following in a single record: , In Postgres 9.5 use the function jsonb_each_text() in a lateral join:
code :
with my_table(pairs) as (
    ('{ "foo": 1, "bar": 2 }'::jsonb)

select t.*
from my_table t
cross join jsonb_each_text(pairs)
where value = '1';
select *
from my_table
where jsonb_path_exists(pairs, '$.* ? (@ == 1)')
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