mysql 多行并在一行查询语句的写法
使用关联关系是合并不了的 此时使用函数来解决
SELECT
a.place_id_,
a.name_,
a.organ_name_,
(select group_concat(b.organ_name_ Separator ',') from m604020_meeting_place_template b where b.place_id_=a.place_id_ group by b.place_id_) as organ
FROM
m6040_meeting_place a
弊端 ：此种办法是可以合并数据 但是要使用organ这个别名作为查询条件则是不起作用的，所以需要创建视图来解决
CREATE VIEW m604020_meeting_template_view as
SELECT
a.place_id_,
a.name_,
SELECT
a.place_id_,
a.name_,
a.organ_name_
(select group_concat(b.organ_name_ Separator ',') from m604020_meeting_place_template b where b.place_id_=a.place_id_ group by b.place_id_) as organ
FROM
m6040_meeting_place a
(select group_concat(b.organ_name_ Separator ',') from m604020_meeting_place_template b where b.place_id_=a.place_id_ group by b.place_id_) as organ
FROM
m6040_meeting_place a
此时可以通过
select * from m604020_meeting_template_view where organ like '%研究室%' 来查询