Postgres

From Bitpost wiki
Revision as of 13:24, 15 August 2018 by M (talk | contribs) (Created page with "=== NOSQL via JSON === GORGEOUS POSTGRES JSON QUERY! inject blobs of JSON, then you can crack open the json inside a cell! CREATE TABLE stocks ( id integer NOT NULL...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

NOSQL via JSON

GORGEOUS POSTGRES JSON QUERY! inject blobs of JSON, then you can crack open the json inside a cell!

   CREATE TABLE stocks (
     id integer NOT NULL,
     board_id integer NOT NULL,
     data jsonb
   );
   INSERT INTO stocks VALUES (1, 1, '{"symbol": "GOOG", "tags": ["hot", "trending"], "owned": true}');
   # returns count of data that HAS the field ingredients
   SELECT count(*) FROM stocks WHERE data ? 'ingredients';
   # ->> will return the property as integer or text (the parsed form of the attribute).
   SELECT * FROM stocks WHERE data->>'owned' = 'true';         # if data.owned == true
   # -> will return the attribute as a JSON object
   SELECT jsonb_array_elements_text(data->'tags') as tag FROM stocks WHERE id = 1;
   # returns the actual tag values, eg:
       tag
       --------------
       Improvements
       Office
       (2 rows)
   # NEXT: EXPLORE INDEXING!
   https://blog.codeship.com/unleash-the-power-of-storing-json-in-postgres/