Question

我正在使用mysql来执行查询。有以下7个表。

约会//非原子的，例如。值 - ＆gt; 1,7,3
性别//原子价值
模块//非原子的，例如。值 - ＆gt; 12,33
程序
秩
人员
学生

我试过'concat'，'find_in_set'＆amp; 'in'功能但无法使其工作。我怎样才能显示多个值@ relations'comvention'＆amp; '模块'？

以下陈述是我能得到的最接近的陈述。如果需要更多详细信息，请告知我们，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

如何在单列显示多个以逗号分隔的值？

1 个答案: