Stored procedures 是否在存储过程中创建Select子句？

我有两个表，其中包含来自两个不同系统的数据。我需要核对这两个表中的数据 列映射需要进行配置

例如：

因此，我需要有两个基于表中映射的类似结果集。这需要动态决定。i、 e.从A中选择uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

这可能吗？

如果列集相似，则使用a如果列集不相似，则无论如何，您将无法以有意义的方式组合它们的结果

select col1a, col2a from A
union
select col1b, col2b from b

Select Col1A, Col2A from A
Select Col2B, Col1B from B

select col1a, col2a from A
union
select col1b, col2b from b