比较临时表中的值;相应地更新表

Question

请考虑两个临时表：

select object_a into #a from dba.object_a group by object_a

object_a
--------
123
456
789

select object_b into #b from dba.object_b group by object_b

object_b
--------
123
999

我想更新表格#b，其中的列标记#a以及#b中存在的对象：

alter table #b add InTableA int;

update #a set InTableA = (
  case when object_a in (select object_a from #a) then 1 else 0 end
)

然而，这不起作用：我不断收到错误invalid column name InTableA ??

我做错了什么？

Answer 1

您正在更新错误的表：

update #b
--------^
    set InTableA = (case when object_b in (select object_a from #a) then 1 else 0 end)
------------------------------^