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CREATE TABLE mytable( id INTEGER NOT NULL PRIMARY KEY ,js jsonb NOT NULL ); INSERT INTO mytable(id,js) VALUES (1,'[{ "pc": "4", "metal_id": "1" }, { "pc": "4", "metal_id": "5" }]'); INSERT INTO mytable(id,js) VALUES (2,'[{ "pc": "1", "metal_id": "1" }, { "pc": "1", "metal_id": "2" }]');
1 rows affected
1 rows affected
select obj ->> 'metal_id' metal_id, sum((obj ->> 'pc')::int) cnt from mytable t cross join lateral jsonb_array_elements(t.js) j(obj) group by obj ->> 'metal_id' order by metal_id
metal_id
cnt
1
5
2
1
5
4