Mysql a database table stored in the id field, separated by commas, id corresponding details in another table, implementation of the query ...

1, the first

SELECT `a`.`id`,`a`.`submit_time`,`a`.`house_id`,`a`.`status`,`a`.`type`,`a`.`request`,`a`.`response`,`a`.`expense_customer`,`a`.`expense_company`,
CONCAT(b.real_name,'(',(select `name` from es_department where id in (trim(BOTH ',' FROM b.dept_id))),')' ) AS sale_name,
`b`.`phone`,`f`.`node_name` 
FROM `es_bl_ticket_house` `a` 
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2, the second

SELECT `a`.`id`,`a`.`submit_time`,`a`.`house_id`,`a`.`status`,`a`.`type`,`a`.`request`,`a`.`response`,`a`.`expense_customer`,`a`.`expense_company`,concat_ws('',`b`.`real_name`,'(',d.name,')') AS sale_name,`b`.`phone`,`f`.`node_name` 
FROM `house` `a` 
LEFT JOIN `staff` `b` ON `a`.`salement_id`=`b`.`id` 
LEFT JOIN `department` `d` ON find_in_set(d.id,b.dept_id) 
LEFT JOIN `main` `h` ON `a`.`house_id`=`h`.`hid` 
LEFT JOIN `dictionary` `hd` ON `h`.`dictionary_id`=`hd`.`cid`  
INNER JOIN `workflow_relate_record` `e` ON `e`.`record_id`=`a`.`id` 
LEFT JOIN `workflow_record` `f` ON `e`.`workflow_record_id`=`f`.`id` 
WHERE `a`.`status` <> '0'  AND `e`.`module_id` IN (1004,1005) GROUP BY a.id ORDER BY a.submit_time DESC
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select u.id,u.name，group_concat(b.名称) from u left join b on find_in_set(b.id,u.部门Id) group by u.id;
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Reproduced in: https: //juejin.im/post/5c87276bf265da2d914dc96e