Question

select * from product where customer_id = (delete from product where product_id = 5 and customer_id = 1 returning customer_id);

当我在上面运行查询时，我得到：

错误：“来自”或附近的语法错误

但是单独运行delete from product where product_id = 5 and customer_id = 1 returning customer_id可以正常工作，并返回customer_id。

所以问题是子查询是否始终是select语句？还有其他方法可以在一个查询中进行删除和选择吗？

Answer 1

使用CTE：

with d as (
      delete from product
      where product_id = 5 and customer_id = 1
      returning customer_id
     )
select p.*
from product p
where p.customer_id in (select d.customer_id from d);

子查询应该始终是select语句吗？

1 个答案: