mysql结果使用set和case错误地排序

Question

我有以下变量和查询。出于某种原因，它正在以错误的顺序对结果进行排序。

$fieldlist = 'SMOOTH,EMBOSSED,AAR,EMBOSSED AAR';

$strap_query = $db1q->query("
SELECT id,name,tag,size,break,footage,coils_per_skid,core_size,grade,color,cost 
FROM Plastic_Strapping 
WHERE subcat=$subcat AND visibility='1' 
ORDER BY case when tag in ('$fieldlist') then 0 else 1 end, FIELD(tag,'$fieldlist'), sort_order ASC") 
or die ('Unable to execute query. '. mysqli_error($db1q));

订单支持

1. SMOOTH
2. 压花
3. AAR
4. EMBOSSED AAR

但相反，它会按照以下 INCORRECT 顺序对它们进行排序

1. SMOOTH
2. AAR
3. 压花
4. EMBOSSED AAR

知道为什么吗？

是因为EMBOSSED AAR包含EMBOSSED吗？所以把它放在AAR之后？如果是这样，任何想法如何解决？

修改

在'SMOOTH','EMBOSSED','AAR','EMBOSSED AAR'部分中放置ORDER BY FIELD有效;但是，我仍然希望能够通过变量编辑它。以下不起作用。

$fieldlist = "'SMOOTH','EMBOSSED','AAR','EMBOSSED AAR'";

$strap_query = $db1q->query("SELECT id,name,tag,size,break,footage,coils_per_skid,core_size,grade,color,cost FROM Plastic_Strapping WHERE subcat=$subcat AND visibility='1' ORDER BY case when tag in ('$fieldlist') then 0 else 1 end, FIELD(tag, $fieldlist), sort_order ASC") or die ('Unable to execute query. '. mysqli_error($db1q));

抛出此错误

  

无法执行查询。您的SQL语法有错误;查看与您的MySQL服务器版本对应的手册   语法可以使用＆＃39; SMOOTH＆＃39;，＆＃39; EMBOSSED＆＃39;，＆＃39; AAR＆＃39;，＆＃39; EMBOSSED AAR＆＃39;）然后0   否则1结束，FIELD（标记，＆＃39; SMOOTH＆＃39;＆＃39;在第1行

Answer 1

试试这个：

$fieldlist = 'SMOOTH,EMBOSSED,AAR,EMBOSSED AAR';

  $query = "SELECT id,name,tag,size,break,footage,coils_per_skid,core_size,grade,
      color,cost  FROM Plastic_Strapping WHERE subcat = $subcat AND visibility='1'
     ORDER BY FIELD( tag, '".implode("','",explode(',',$fieldlist))."' )";

更新

如果您的$fieldlist变量是这样的：

$fieldlist = "'SMOOTH','EMBOSSED','AAR','EMBOSSED AAR'";

您的查询将是这样的：

$query = "SELECT id,name,tag,size,break,footage,coils_per_skid,core_size,grade,
           color,cost 
           FROM Plastic_Strapping WHERE subcat = $subcat AND visibility = '1' 
           ORDER BY case when tag in ($fieldlist) then 0 else 1 end, 
                    FIELD(tag, $fieldlist), sort_order ASC ";