Question

我有2个表（MySQL）

data_details
accounts_invoices

理想情况下，每个data_details都应具有accounts_invoices ID。（data_details有一个带有accounts_invoices主键的外键）

由于某些原因，有一些data_details记录，其中accounts_invoices表中不存在accounts_invoice_id

所以我尝试用已知的accounts_invoice id更新那些data_details记录。这就是我做的事情

update data_details 
set account_invoice_id = 1
where account_invoice_id in (
  select d.id
  from data_details d left join accounts_invoices a
  on d.account_invoice_id = a.id
  where a.id is null    
)

但是发生错误

您可以在FROM子句中指定目标表'data_details'以进行更新（错误1093）

欢呼声

sameera

Answer 1

现在这可能是一个疯狂的猜测，但我认为问题是你更新了你正在查询的同一个表。我认为解决方法是使用临时表，如下所示：

update data_details 
set account_invoice_id = 1
where account_invoice_id in (
select * from (
  select d.id
  from data_details d left join accounts_invoices a
  on d.account_invoice_id = a.id
  where a.id is null    
) as t
)

虽然没试过，所以可能都错了。

更新了SQL 以修复我在评论中发现的错误。

update data_details 
set account_invoice_id = 1
where id in (
select * from (
  select d.id
  from data_details d left join accounts_invoices a
  on d.account_invoice_id = a.id
  where a.id is null    
) as t
)

MySQL批量更新

1 个答案: