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(jìn)行連接查詢(xún)?nèi)〕鑫覀冃枰淖侄?#xff0c;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(hào)隔開(kāi)

//這兩個(gè)是網(wǎng)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(gè)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(chǔ)格式為 7,8,9,11,10,12 ，數(shù)據(jù)類(lèi)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(jié)果

到此這篇關(guān)于MySQL將一個(gè)字段中以逗號(hào)分隔的取出來(lái)形成新的字段實(shí)現(xiàn)的文章就介紹到這了,更多相關(guān)MySQL字段逗號(hào)分隔內(nèi)容請(qǐng)搜索云海天教程以前的文章或繼續(xù)瀏覽下面的相關(guān)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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