Question

我有一个有趣的情况，我想看看是否有解决方案...我在同一台服务器上的4个数据库中有4个表，所有表都具有相同的结构：

Pnl_IL_2012数据库中的

dbo.IL_Membership Pnl_NM_2012数据库中的dbo.NM_Membership

我想将每个表中的聚合数据集合并到一个数据集中，但我正在尝试使用（USE [Pnl_IL_2012] - ＆gt; Go）构造来尝试获取每个聚合查询的数据

select * from 
(USE [Pnl_IL_2012]
GO
select 'IL' as PlanID, sum(Contracts_Hlth) as PROD_Contracts_Hlth from dbo.IL_Membership where [month] between '2012-09-01' and '2012-10-31') Q1

联合所有

select * from
(USE [Pnl_NM_2012]
GO
select 'NM' as PlanID, sum(Contracts_Hlth) as PROD_Contracts_Hlth from dbo.NM_Membership where [month] between '2012-09-01' and '2012-10-31') Q2

我收到这些错误：

Msg 156, Level 15, State 1, Line 2
Incorrect syntax near the keyword 'USE'.
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near ')'.
Msg 156, Level 15, State 1, Line 5
Incorrect syntax near the keyword 'USE'.
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near ')'.

任何人都有办法让联盟全部跨数据库工作？我不需要加入一个工会......

Answer 1

GO表示批处理结束，因此不能在查询中使用。

而是使用three part name：

引用表格

Pnl_IL_2012.dbo.IL_Membership

提供以下查询：

select 'IL' as PlanID, sum(Contracts_Hlth) as PROD_Contracts_Hlth 
from Pnl_IL_2012.dbo.IL_Membership 
where [month] between '2012-09-01' and '2012-10-31'

union all

select 'NM' as PlanID, sum(Contracts_Hlth) as PROD_Contracts_Hlth 
from Pnl_NM_2012.dbo.IL_Membership 
where [month] between '2012-09-01' and '2012-10-31'

使用“Union All”和数据库之间的查询

1 个答案: