如何在单列中显示以逗号分隔的多个值？

Question

我正在使用 mysql 来执行查询。有以下7个表。

appointment //非原子的，例如。值 -> 1,7,3
性别//原子值
module //非原子的，例如。值 -> 12,33
计划
排名
员工
学生

我尝试了 'concat'、'find_in_set' 和 'in' 功能，但无法正常工作。我如何显示多个值 @ relations 'appointment' & 'module'?

以下是我能得到的最接近的说法。如果需要更多详细信息，请告诉我，谢谢。

SELECT sta.staName
      , r.rank
      , sta.appointmentID
      , a.appointment
      , m.moduleCode 
  FROM staff AS sta 
 JOIN rank AS r 
    ON (sta.rankID = r.rankID) 
 JOIN appointment AS a 
ON (sta.appointmentID = a.appointmentID) 
 JOIN module AS m 
    ON (sta.teachModuleID = m.moduleID) 
  WHERE sta.genderID = 1;

Answer 1

SELECT sta.staName, r.rank, sta.appointmentID, 
       group_concat(distinct a.appointment) as appointments,
       group_concat(distinct m.moduleCode) as moduleCodes
FROM staff AS sta 
INNER JOIN rank AS r ON sta.rankID = r.rankID
INNER JOIN appointment AS a ON find_in_set(sta.appointmentID, a.appointmentID) > 0
INNER JOIN module AS m ON find_in_set(sta.teachModuleID, m.moduleID) > 0
WHERE sta.genderID = 1
GROUP BY sta.staName, r.rank, sta.appointmentID

如何在单列中显示以逗号分隔的多个值？

how to display multiple values, separated by commas, at single columns?

mysql

inner-join