group_concat: concatenate a field of the query result set into a string
SELECT GROUP_CONCAT(t.cabinet_no SEPARATOR ';') FROM tb_stockorder t WHERE t.id
IN(
'INV20060300015',
'INV20060300019',
'INV20060300021',
'INV20060300023',
'INV20060300031',
'INV20060300033',
'INV20060300038')