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with table1 (id,members) as ( values (1,'[{"computer": "12.12.12.12","tag": "dog"},{"computer": "1.1.1.1","tag": "cat"},{"computer": "2.2.2.2","tag": "cow"}]'::jsonb) ), table2 (id,members) as ( values (1,'[{"IP address": "12.12.12.12","name": "Beni", "address": "Rome"},{"IP address": "1.1.1.1","name": "Jone", "address": "Madrid"}]'::jsonb) ) select t1.computer, t1.tag, t2.name from jsonb_to_recordset((select members from table1 where id=1)) as t1(computer text,tag text) join jsonb_to_recordset((select members from table2 where id=1)) as t2("IP address" text,name text) on t1.computer = t2."IP address"
computer
tag
name
12.12.12.12
dog
Beni
1.1.1.1
cat
Jone
SELECT 2