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(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(shù)據(jù)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(xiàn)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腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！
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