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create table vals (value text);
insert into vals values ('{"roles": ["1","2","3","4"]}'), ('{"roles": ["1","4"]}');
create table roles (id int, role_name text);
insert into roles values (1, "Admin"), (2, "Finance"), (3, "Payroll"), (4, "Accountant")
Records: 2  Duplicates: 0  Warnings: 0

Records: 4  Duplicates: 0  Warnings: 0
select json_object('role', (select json_arrayagg(r1.role_name) from json_table(t.value, '$.roles[*]' columns(role int path '$')) r join roles r1 on r.role = r1.id)) from vals t

json_object('role', (select json_arrayagg(r1.role_name) from json_table(t.value, '$.roles[*]' columns(role int path '$')) r join roles r1 on r.role = r1.id))
{"role": ["Admin", "Finance", "Payroll", "Accountant"]}
{"role": ["Admin", "Accountant"]}