select to_jsonb(row('_', substr(md5(random()::text), 1, 50)));
--select row_to_json(select 1 as a, 2 as b )
SELECT 1,2.5,'this is a test' , now() - (random() * (interval '90 days'));
/* select row_to_json(uuid_generate_v4()
,generate_series(1, 1000)
, now() - (random() * (interval '90 days'))
,substr(md5(random()::text), 1, 50))*/
SELECT 1 as a ,2.5 as b