我的表结构是
cat_id cat_desc parent_category par_cat_order cdate status
1 Machine 2017-12-22 13:10:51 active
2 Woods 2017-12-22 13:11:01 active
3 Tools 2017-12-22 13:11:10 active
4 Perol 1 1 2017-12-22 13:11:30 active
5 Diesel 1 1 2017-12-22 13:11:43 active
6 Table 2 2 2017-12-22 13:11:59 active
7 Chair 2 2 2017-12-22 13:12:13 active
8 Round Table 6 2,6 2017-12-22 13:12:32 active
9 Dining 6 2,6 2017-12-22 13:13:01 active
10 Cuting Player 3 3 2017-12-22 13:13:15 active
11 Scrow Driver 3 3 2017-12-22 13:13:40 active
12 Sandal 9 2,6,9 2017-12-22 13:32:23 active
我希望在两者中显示类别编号的父类别描述（＆＃39; parent_category＆＃39;，＆＃39; par_cat_order＆＃39;）
我的查询是
select a.cat_id,
a.cat_desc,
b.cat_desc,
group_concat(c.cat_desc)
from category a
left JOIN category b on (a.parent_category=b.cat_id)
left JOIN category c on find_in_set(c.cat_id,a.par_cat_order)
GROUP by a.cat_id
，输出
cat_id cat_desc cat_desc group_concat(c.cat_desc)
1 Machine
2 Woods
3 Tools
4 Perol Machine Machine
5 Diesel Machine Machine
6 Table Woods Woods
7 Chair Woods Woods
8 Round Table Table Table,Woods
9 Dining Table Table,Woods
10 Cuting Player Tools Tools
11 Scrow Driver Tools Tools
12 Sandal Dining Dining,Table,Woods
我需要的是＆＃39; group_concat（c.cat_desc）＆＃39;以存储的顺序显示字段。对于例如 我存储在＆＃39; par_cat_order＆＃39;作为第8记录的2,6。它将显示Woods，Table。但它显示了＆＃34; Table，Woods＆＃34;