合併相關數據

Question

我有一個表的結構是這樣的：

BUSINESS NAME  CATEGORY 
ABC Inc.    Pipes 
ABC Inc.    Plumbing 
Joe's Plumbing  Plumbing 
Joe's Plumbing  Emergency 

我想重組類在同一行中，由字符分隔： 然後我會得到：

ABC Inc.    Pipes,Plumbing 
Joe's Plumbing  Plumbing,Emergency 

我該怎麼做？

謝謝！

Answer 1

我不能得到正確的表名，其字段但你應該嘗試象下面這樣：

select GROUP_CONCAT(BUSINESS NAME) as "Business Name",CATEGORY from table_name group by CATEGORY; 

Answer 2

可以使用group_concat功能這一點。

確保您已group_concat_max_len正確設置在group_concat

select 
group_concat(distinct business_name order by business_name) as business_name, 
category 
from your_table 
group by category;