我有這個MySQL查詢,它的工作原理: SELECT
nom
,prenom
,(SELECT GROUP_CONCAT(category_en) FROM
(SELECT DISTINCT category_en FROM categories c WHERE id IN
(SELECT DISTINCT category_id FRO
我有這個疑問: select acc_num
from (select distinct ac_outer.acc_num, ac_outer.owner
from ac_tab ac_outer
where (ac_outer.owner = '1234567')
and ac_outer.owner = (select sq.owner