select aid,group_concat(bid order by bid separator ',') as bid_str from tbl group by aid;
SET GLOBAL group_concat_max_len = 1024;
show variables like "group_concat_max_len";
select aid,group_concat(bid order by bid separator ',') as bid_str from tbl group by aid;
SET GLOBAL group_concat_max_len = 1024;
show variables like "group_concat_max_len";
本站轉載的文章為個人學習借鑒使用,本站對版權不負任何法律責任。如果侵犯了您的隱私權益,請聯系本站郵箱yoyou2525@163.com刪除。