错误 - 我在这个SQL查询中做错了什么？

Question

I am trying to update values in a table from the same table using a particular condition but it is not running

I have tried it using "WITH"

update my_table as res1
set res1.my_column = (select res2.my_column from my_table as res2
                      where res2.parent_id is null and res2.is_company = true)
where res1.parent_id=res2.id;

Answer 1

只需尝试下面的SQL：

update my_table as res1 set my_column = res2.my_column from my_table res2 where res1.parent_id = res2.id and res2.partner_id is null and res2.is_company;

Answer 2

You don't specify the type of SQL server, but generally an UPDATE from a SELECT takes a particular syntax:

How do I UPDATE from a SELECT in SQL Server?