sqlserver 2008 查看表描述，和表结构

sp_help   sys_user

sp_columns   sys_user

--表结构

SELECT  CASE WHEN col.colorder = 1 THEN obj.name

                  ELSE ''

             END AS 表名,

        col.colorder AS 序号 ,

        col.name AS 列名 ,

        ISNULL(ep.[value], '') AS 列说明 ,

        t.name AS 数据类型 ,

        col.length AS 长度 ,

        ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0) AS 小数位数 ,

        CASE WHEN COLUMNPROPERTY(col.id, col.name, 'IsIdentity') = 1 THEN '√'

             ELSE ''

        END AS 标识 ,

        CASE WHEN EXISTS ( SELECT   1

                           FROM     dbo.sysindexes si

                                    INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id

                                                              AND si.indid = sik.indid

                                    INNER JOIN dbo.syscolumns sc ON sc.id = sik.id

                                                              AND sc.colid = sik.colid

                                    INNER JOIN dbo.sysobjects so ON so.name = si.name

                                                              AND so.xtype = 'PK'

                           WHERE    sc.id = col.id

                                    AND sc.colid = col.colid ) THEN '√'

             ELSE ''

        END AS 主键 ,

        CASE WHEN col.isnullable = 1 THEN '√'

             ELSE ''

        END AS 允许空 ,

        ISNULL(comm.text, '') AS 默认值

FROM    dbo.syscolumns col

        LEFT  JOIN dbo.systypes t ON col.xtype = t.xusertype

        inner JOIN dbo.sysobjects obj ON col.id = obj.id

                                         AND obj.xtype = 'U'

                                         AND obj.status >= 0

        LEFT  JOIN dbo.syscomments comm ON col.cdefault = comm.id

        LEFT  JOIN sys.extended_properties ep ON col.id = ep.major_id

                                                      AND col.colid = ep.minor_id

                                                      AND ep.name = 'MS_Description'

        LEFT  JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id

                                                         AND epTwo.minor_id = 0

                                                         AND epTwo.name = 'MS_Description'

WHERE   obj.name = 'sys_user'--表名

ORDER BY col.colorder ;  

--表描述

SELECT tbs.name 表名,ds.value 描述

FROM sys.extended_properties ds

LEFT JOIN sysobjects tbs ON ds.major_id=tbs.id

WHERE  ds.minor_id=0 and

 tbs.name='sys_user';--表名