1例如：要把如圖1的字段拆分圖2

select account_id,

substring_index(substring_index(a.related_shop_ids,","

,b.help_topic_id+1),",",-1) shopid

from

sales_hang_account a

join

mysql.help_topic b

on b.help_topic_id < (length(a.related_shop_ids) - length(replace(a.related_shop_ids,",",""))+1)

order by a.account_id

2：然后和shops表進行連接查詢取出我們需要的字段，我這里需要取出name

select s.`name` as shopname,a.account_id from shops s

inner JOIN (

select account_id,

substring_index(substring_index(a.related_shop_ids,","

,b.help_topic_id+1),",",-1) shopid

from

sales_hang_account a

join

mysql.help_topic b

on b.help_topic_id < (length(a.related_shop_ids) - length(replace(a.related_shop_ids,",",""))+1)

order by a.account_id)a on s.shop_id=a.shopid

3:將 account_id相同合并成一行，以逗號隔開

//這兩個是網上的例子

select ID,group_concat(NAME) as NAME from table group by ID;

select ID,group_concat(NAME SEPARATOR ";") as NAME from a group by ID;

//借助上面兩個參考

select account_id,GROUP_CONCAT(shopname SEPARATOR",")as shopname from (select s.`name` as shopname,a.account_id from shops s

inner JOIN (

select account_id,

substring_index(substring_index(a.related_shop_ids,","

,b.help_topic_id+1),",",-1) shopid

from

sales_hang_account a

join

mysql.help_topic b

on b.help_topic_id < (length(a.related_shop_ids) - length(replace(a.related_shop_ids,",",""))+1)

order by a.account_id)a on s.shop_id=a.shopid) a GROUP BY account_id

效果如下

第二種方法

select g.account_id,g.related_shop_ids,GROUP_CONCAT(s.name)as shopname from sales_hang_account g left join shops s on FIND_IN_SET(s.shop_id , g.related_shop_ids)

GROUP BY g.account_id

SqlServer

[Product] -- 該字段存儲格式為 7,8,9,11,10,12 ，數據類型為nvarchar

select id,ProductName=stuff((select "," + product_chinaname from base_supplier_product where charindex(","+ltrim(productid)+",",","+ Product + ",") > 0 for xml path("") ), 1, 1, "")

FROM base_Pre_sale_project

結果

到此這篇關于MySQL將一個字段中以逗號分隔的取出來形成新的字段實現的文章就介紹到這了,更多相關MySQL字段逗號分隔內容請搜索云海天教程以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持云海天教程！

原文鏈接：https://www.cnblogs.com/weixin18/p/9827222.html

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