当表具有相同的结构时，如何使用视图跨越多个表

Question

所以我们有一个接收常量输入的数据库，然后我们将它在 x 天后作为 archive/reporting 类型的数据库移动到另一个数据库。所以问题是当我尝试创建一个合并两个表（每个数据库一个）的视图时：

CREATE VIEW Table_Full AS SELECT * FROM [Front].dbo.[DATA] AS A Inner Join Back.dbo.DATA AS B ON A.DATETIME=B.DATETIME

我收到以下错误："Column names in each view or function must be unique. Column name 'PARTNO' in view or function 'Table_Full' is specified more than once."

那么，有没有更好的方法来完成我想做的事情？

Answer 1

您必须指定每个字段并为重复的字段名称提供别名，而不是星号：

CREATE VIEW Table_Full AS
 SELECT  
   a.ID as A_ID,
   b.ID as B_ID,
   a.Thingy as A_Thingy,
   a.Etcetera as Atcetera
 FROM [Front].dbo.[DATA] AS A
 Inner Join Back.dbo.DATA AS B
 ON A.DATETIME=B.DATETIME

Answer 2

鉴于您的用例，我认为您需要联合。即

select * from table_a
Union all
Select * from table_b

当表具有相同的结构时，如何使用视图跨越多个表

How to span mulitiple tables with a view, when the tables have same structure

sql

sql-server

views

view