MySQL批量更新

Question

我有 2 个表(MySQL)

1. 数据详情
2. accounts_invoices

理想情况下，每个 data_details 都应该有一个 accounts_invoices id。 (data_details 有一个带有 accounts_invoices 主键的外键)

由于某些原因，在 accounts_invoices 表中存在 accounts_invoice_id 不存在的 data_details 记录

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

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    
)

但是出现错误说

您可以在 FROM 子句中指定要更新的目标表 'data_details'(错误 1093)

谁能帮帮我，在此先感谢

干杯

萨梅拉

Answer 1

现在这可能是一个大胆的猜测，但我认为问题在于您更新了您正在查询的同一个表。我认为解决方法是使用一个临时表，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
)

虽然还没有尝试过，所以可能都是错误的。

---

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
)