两表关联，求唯一的数据

[xjb_netboy]

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[发布信息表]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[发布信息表]
GO
--发布信息表


if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[发布信息表]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[发布信息表]
GO

CREATE TABLE [dbo].[发布信息表] (
[信息ID] [varchar] (50) COLLATE Chinese_PRC_CI_AS NOT NULL ,
[企业ID] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[职位] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[发布时间] [smalldatetime] NULL
) ON [PRIMARY]
GO

ALTER TABLE [dbo].[发布信息表] ADD
CONSTRAINT [PK_p] PRIMARY KEY CLUSTERED
(
[信息ID]
) ON [PRIMARY]
GO



---企业表

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[企业表]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[企业表]
GO

CREATE TABLE [dbo].[企业表] (
[企业ID] [char] (10) COLLATE Chinese_PRC_CI_AS NOT NULL ,
[企业名] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO

ALTER TABLE [dbo].[企业表] ADD
CONSTRAINT [PK_e] PRIMARY KEY CLUSTERED
(
[企业ID]
) ON [PRIMARY]
GO


求，一家企业，最新发布（发布信息表.按时间排序）的2条信息


谢谢!!!!!!!!!

[playwarcraft]

select top 2 a.企業ID,a.企業名,b.信息ID,b.職位,b.发布时间
from 企业表 a,发布信息表 b
where a.企業ID=b.企業ID
order by b.发布时间 desc