MySQL将⼀个字段中以逗号分隔的取出来形成新的字段实现1例如：要把如图1的字段拆分图2
select account_id,
substring_index(substring_lated_shop_ids,','
,b.help_topic_id+1),',',-1) shopid
from
sales_hang_account a
join
mysql.help_topic b
on b.help_topic_id < (lated_shop_ids) - length(lated_shop_ids,',',''))+1)
order by a.account_id
2：然后和shops表进⾏连接查询取出我们需要的字段，我这⾥需要取出name
select s.`name` as shopname,a.account_id from shops s
inner JOIN (
select account_id,
substring_index(substring_lated_shop_ids,','
,
b.help_topic_id+1),',',-1) shopid
from
sales_hang_account a
join
mysql.help_topic b
on b.help_topic_id < (lated_shop_ids) - length(lated_shop_ids,',',''))+1)
order by a.account_id)a on s.shop_id=a.shopid
3：将 account_id相同合并成⼀⾏，以逗号隔开
//这两个是⽹上的例⼦
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;
//借助上⾯两个参考
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_lated_shop_ids,','
,b.help_topic_id+1),',',-1) shopid
from
sales_hang_account a
mysql group by order byjoin
mysql.help_topic b
on b.help_topic_id < (lated_shop_ids) - length(lated_shop_ids,',',''))+1)
order by a.account_id)a on s.shop_id=a.shopid) a GROUP BY account_id
效果如下
第⼆种⽅法
select g.account_lated_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] -- 该字段存储格式为 7,8,9,11,10,12 ，数据类型为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
结果
到此这篇关于MySQL将⼀个字段中以逗号分隔的取出来形成新的字段实现的⽂章就介绍到这了，更多相关MySQL字段逗号分隔内容请搜索以前的⽂章或继续浏览下⾯的相关⽂章希望⼤家以后多多⽀持！
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