1.获取数据库中的表
select name from sysobjects where type=‘U‘
2.获取表字段（此处是Route表）
Select name from syscolumns Where ID=OBJECT_ID(‘Route‘)
3.获取表中字段的描述
SELECT value FROM ::fn_listextendedproperty (NULL, ‘user‘, ‘dbo‘, ‘table‘, ‘Route‘, ‘column‘, default)
4.获取表的信息的所有信息如下图
select b.[value] from sys.columns a left join sys.extended_properties b on a.object_id=b.major_id and a.column_id=b.minor_id inner join sysobjects c on a.column_id=c.id and a.[name]=‘列名‘ and c.[name]=‘表名‘ SELECT 表名=case when a.colorder=1 then d.name else ‘‘ end, 表说明=case when a.colorder=1 then isnull(f.value,‘‘) else ‘‘ end, 字段序号=a.colorder, 字段名=a.name, 标识=case when COLUMNPROPERTY( a.id,a.name,‘IsIdentity‘)=1 then ‘√‘else ‘‘ end, 主键=case when exists(SELECT 1 FROM sysobjects where xtype=‘PK‘ and name in ( SELECT name FROM sysindexes WHERE indid in( SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid ))) then ‘√‘ else ‘‘ end, 类型=b.name, 占用字节数=a.length, 长度=COLUMNPROPERTY(a.id,a.name,‘PRECISION‘), 小数位数=isnull(COLUMNPROPERTY(a.id,a.name,‘Scale‘),0), 允许空=case when a.isnullable=1 then ‘√‘else ‘‘ end, 默认值=isnull(e.text,‘‘), 字段说明=isnull(g.[value],‘‘) FROM syscolumns a left join systypes b on a.xusertype=b.xusertype inner join sysobjects d on a.id=d.id and d.xtype=‘U‘ and d.name<>‘dtproperties‘ left join syscomments e on a.cdefault=e.id left join sys.extended_properties g on a.id=g.major_id and a.colid=g.minor_id left join sys.extended_properties f on d.id=f.major_id and f.minor_id=0 --where d.name=‘orders‘ --如果只查询指定表,加上此条件 order by a.id,a.colorder
如下图
SELECT [TableName] = i_s.TABLE_NAME, [ColumnName] = i_s.COLUMN_NAME, [Description] = s.value, [DataType]=i_s.DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS i_s LEFT OUTER JOIN sys.extended_properties s ON s.major_id = OBJECT_ID(i_s.TABLE_SCHEMA+‘.‘+i_s.TABLE_NAME) AND s.minor_id = i_s.ORDINAL_POSITION AND s.name = ‘MS_Description‘ WHERE OBJECTPROPERTY(OBJECT_ID(i_s.TABLE_SCHEMA+‘.‘+i_s.TABLE_NAME), ‘IsMsShipped‘)=0 AND i_s.TABLE_NAME = ‘表名‘ AND i_s.TABLE_SCHEMA=‘架构名‘ ORDER BY i_s.TABLE_NAME, i_s.ORDINAL_POSITION
原文：http://www.cnblogs.com/lxhbky/p/6110653.html