mysql - group, but show all row of a column

问题

I want to group fields but want to show all row of a column called remain:

here is current output without grouping:

And output with group:

And I want This when I group:

Here is mysql query:

SELECT staff.name,
  staff.designation_id_designation,
  staff.status_id_status,
  Concat_Ws('=', leave_remain.leave_type_id_leave_type, leave_remain.days) AS
  remain
FROM staff INNER JOIN
  leave_remain ON staff.id_staff = leave_remain.staff_id_staff
GROUP BY staff.name

回答1:

use GROUP_CONCAT

SELECT  staff.name,
        staff.designation_id_designation,
        staff.status_id_status,
        GROUP_CONCAT(Concat_Ws('=', leave_remain.leave_type_id_leave_type, leave_remain.days)) AS remain
FROM    staff 
        INNER JOIN leave_remain 
            ON staff.id_staff = leave_remain.staff_id_staff
GROUP   BY staff.name, staff.designation_id_designation, staff.status_id_status

SQLFiddle Demo

回答2:

Try this:

SELECT staff.name,
  staff.designation_id_designation,
  staff.status_id_status,
  GROUP_CONCAT(Concat_Ws('=', leave_remain.leave_type_id_leave_type, leave_remain.days) SEPARATOR ' ') AS remain
FROM staff INNER JOIN
  leave_remain ON staff.id_staff = leave_remain.staff_id_staff
GROUP BY staff.designation_id_designation,
         staff.name,
         staff.status_id_status;

回答3:

TRy this for this we need to use group_contact seperate by ' '.

SELECT staff.name,
  staff.designation_id_designation,
  staff.status_id_status,
  GROUP_CONCAT(Concat_Ws('=', leave_remain.leave_type_id_leave_type, leave_remain.days) SEPARATOR ' ') AS remain
FROM staff 
INNER JOIN
  leave_remain 
ON 
staff.id_staff = leave_remain.staff_id_staff
GROUP BY staff.designation_id_designation,
         staff.name,
         staff.status_id_status;

来源：https://stackoverflow.com/questions/14806631/mysql-group-but-show-all-row-of-a-column

标签

mysql

sql

group-by

concat