按特定列组数据库数据

Question

我有一个数据库，我有一些记录。我想显示由ordNR分组的所有记录，我该怎么做？

SELECT Group_concat(ordnr) ordNR, 
     koden, 
     Group_concat(wish) wish, 
     rnamn, 
     bild, 
     pris, 
     cname, 
     onsktext, 
     restidn 
FROM (SELECT m.ordnr AS ordNR, 
       p.id  AS restidn, 
       t.tabnum AS tabNum, 
       m.wishtext AS onsktext, 
       m.meaoid AS midn, 
       m.ordcode AS koden, 
       w.wish, 
       r.meaname AS rnamn, 
       r.meaimg AS bild, 
       r.meaprice AS pris, 
       k.catname AS cname 
     FROM cats k, 
       meals r, 
       tables t, 
       restaurant p, 
       wishes w, 
       meaorder m 
       JOIN orders c 
       ON c.ordnr 
     WHERE p.id = '3' 
       AND c.tabid = t.tabid 
       AND c.ordstatus = '0' 
       AND m.ordnr = c.ordnr 
       AND m.meaid = r.meaid 
       AND m.wishesid = w.id 
       AND r.catid = k.catid)T 
GROUP BY koden, 
      rnamn, 
      bild, 
      pris, 
      cname 
ORDER BY midn DESC 

Answer 1

第一顺序由ordNR，然后通过midn。