Question

任务表

id      assign_to       task
1       1,2,4           Development
2       2,5,3           Testing

员工表

id      Name
1       Dhawan
2       Sachin
3       Dhoni
4       Virat
5       Rohit

在这里，我试图从employee表中获取所有雇员的姓名，并在任务表中获取assign_to字段。因此我的输出将在以下

id      assign_to               task
1       Dhawan, Sachin,Virat    Development
2       Virat, Rohit, Dhoni     Testing

在我写的查询下面。谁能建议我对此进行查询

select t.*,  from task t inner join employee e on e.id in (t.assign_to)

Answer 1

将查询更新为：

 select t.*,  from task t inner join 
employee e on FIND_IN_SET(e.id, t.assign_to) > 0 
GROUP BY e.id

Answer 2

请尝试这个

select task.id,
(select group_concat(employee.name,',')  
from employee employee  
where  find_in_set(employee.id, task.assign_to)> 0 )  as emp ,   
task.task   
from task task;

如何从mysql取数据，哪列有逗号运算符？

2 个答案: