我需要从第二个表中选择一些行，并将它们连接成逗号分隔的字符串。除一个问题外，查询效果很好-它始终选择所有行，并忽略LIMIT。

这是我的查询的一部分，该查询获取该字符串并忽略LIMIT：

select 
    group_concat(value order by `order` asc SEPARATOR ', ') 
from slud_data 
    left join slud_types on slud_types.type_id=slud_data.type_id 
where slud_data.product_id=18 and value!='' and display=0 limit 3;


// Result:
+---------------------------------------------------------+
| group_concat(value order by `order` asc SEPARATOR ', ') |
+---------------------------------------------------------+
| GA-XXXX, Bentley, CONTINENTAL FLYING SPUR, 2006         |
+---------------------------------------------------------+

// Expected result: (only 3 comma-separated records, not 4)

完整查询：

SELECT *,product_id id,
    (select group_concat(value order by `order` asc SEPARATOR ', ') from slud_data left join slud_types on slud_types.type_id=slud_data.type_id where slud_data.product_id=t1.product_id and value!='' and display=0 limit 3) text
FROM slud_products t1 
WHERE 
    now() < DATE_ADD(date,INTERVAL +ttl DAY) and activated=1
ORDER BY t1.date desc