MySQL actualiza una tabla de otra tabla múltiples columnas
update tabe2 set subject_id = (SELECT GROUP_CONCAT(sub_id SEPARATOR ', ') as sub_id FROM tabe1)
Muddy Macaw
update tabe2 set subject_id = (SELECT GROUP_CONCAT(sub_id SEPARATOR ', ') as sub_id FROM tabe1)
UPDATE `table` SET test=number