将两个sql列合并为一列

Question

我有两列的表，它们都包含整数值，如下所示：

DocumentUpId    RelatedDocId
31608768        31624333
31608768        31624334
31618133        31618117

我正在尝试将它们合并到一个列中，如下所示：

DocumentUpId    
31608768        
31608768        
31618133    
31624333
31624334
31624334

我试过这个：

select rel_CTE.DocumentUpId + rel_CTE.DocumentDownId as 'RelatedDocId' 
into #temprelations 
from RelationsCTE rel_CTE

但它让我连接了值（在这种情况下总和），所以它可能吗？

Answer 1

UNION ALL

select rel_CTE.DocumentUpId  as 'RelatedDocId'  from RelationsCTE
union all
select rel_CTE.DocumentDownId from RelationsCTE

Answer 2

试试这个，

SELECT DocumentUpId as DocumentUpId 
FROM RelationsCTE

UNION ALL

SELECT DocumentDownId as DocumentUpId 
FROM RelationsCTE