1例如：要把如圖1的字段拆分圖2
|
1
2
3
4
5
6
7
8
9
|
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?，我這里需要取出name
|
1
2
3
4
5
6
7
8
9
10
11
12
|
select s.`name` as shopname,a.account_id from shops sinner 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)
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
//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 sinner 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
|
1
2
|
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
|
1
2
3
|
[product] -- 該字段存儲(chǔ)格式為 7,8,9,11,10,12 ，數(shù)據(jù)類(lèi)型為nvarcharselect 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)搜索服務(wù)器之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持服務(wù)器之家！
原文鏈接：https://www.cnblogs.com/weixin18/p/9827222.html
