一、可以添加在企业管理器图形用户界面的描述，或者你可以使用以下代码：
EXEC sp_addextendedproperty
'MS_Description',
'some description',
'user',
dbo,
'table',
table_name,
'column',
column_name
二、可以用下面的代码查询所有表的值：
SELECT [Table Name] = i_s.TABLE_NAME, [Column Name] = i_s.COLUMN_NAME, [Description] = s.value
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 = 'Meter'
ORDER BY i_s.TABLE_NAME, i_s.ORDINAL_POSITION
参考：
1 --1. SqlServer2000数据库字典--表结构.sql
2 SELECT TOP 100 PERCENT --a.id,
3 CASE WHEN a.colorder = 1 THEN d.name ELSE '' END AS 表名,
4 CASE WHEN a.colorder = 1 THEN isnull(f.value, '') ELSE '' END AS 表说明,
5 a.colorder AS 字段序号, a.name AS 字段名, CASE WHEN COLUMNPROPERTY(a.id,
6 a.name, 'IsIdentity') = 1 THEN '√' ELSE '' END AS 标识,
7 CASE WHEN EXISTS
8 (SELECT 1
9 FROM dbo.sysindexes si INNER JOIN
10 dbo.sysindexkeys sik ON si.id = sik.id AND si.indid = sik.indid INNER JOIN
11 dbo.syscolumns sc ON sc.id = sik.id AND sc.colid = sik.colid INNER JOIN
12 dbo.sysobjects so ON so.name = si.name AND so.xtype = 'PK'
13 WHERE sc.id = a.id AND sc.colid = a.colid) THEN '√' ELSE '' END AS 主键,
14 b.name AS 类型, a.length AS 长度, COLUMNPROPERTY(a.id, a.name, 'PRECISION')
15 AS 精度, ISNULL(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0) AS 小数位数,
16 CASE WHEN a.isnullable = 1 THEN '√' ELSE '' END AS 允许空, ISNULL(e.text, '')
17 AS 默认值, ISNULL(g.[value], '') AS 字段说明, d.crdate AS 创建时间,
18 CASE WHEN a.colorder = 1 THEN d.refdate ELSE NULL END AS 更改时间
19 FROM dbo.syscolumns a LEFT OUTER JOIN
20 dbo.systypes b ON a.xtype = b.xusertype INNER JOIN
21 dbo.sysobjects d ON a.id = d.id AND d.xtype = 'U' AND
22 d.status >= 0 LEFT OUTER JOIN
23 dbo.syscomments e ON a.cdefault = e.id LEFT OUTER JOIN
24 dbo.sysproperties g ON a.id = g.id AND a.colid = g.smallid AND
25 g.name = 'MS_Description' LEFT OUTER JOIN
26 dbo.sysproperties f ON d.id = f.id AND f.smallid = 0 AND
27 f.name = 'MS_Description'
28 ORDER BY d.name, a.colorder
29 -- SqlServer2005\2008数据库字典--表结构.sql create view TableDict as
30 SELECT TOP 100 PERCENT --a.id,
31 --CASE WHEN a.colorder = 1 THEN d.name ELSE '' END AS 表名,
32 d.name AS 表名,
33 CASE WHEN a.colorder = 1 THEN isnull(f.value, '') ELSE '' END AS 表说明,
34 a.colorder AS 字段序号, a.name AS 字段名, ISNULL(g.[value], '') AS 字段说明,
35 CASE WHEN COLUMNPROPERTY(a.id,a.name, 'IsIdentity') = 1 THEN '√' ELSE '' END AS 标识,
36 CASE WHEN EXISTS
37 (SELECT 1 FROM dbo.sysindexes si
38 INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id AND si.indid = sik.indid
39 INNER JOIN dbo.syscolumns sc ON sc.id = sik.id AND sc.colid = sik.colid
40 INNER JOIN dbo.sysobjects so ON so.name = si.name AND so.xtype = 'PK'
41 WHERE sc.id = a.id AND sc.colid = a.colid) THEN '√' ELSE '' END AS 主键,
42 b.name AS 类型, a.length AS 长度, COLUMNPROPERTY(a.id, a.name, 'PRECISION') AS 精度,
43 ISNULL(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0) AS 小数位数,
44 CASE WHEN a.isnullable = 1 THEN '√' ELSE '' END AS 允许空, ISNULL(e.text, '') AS 默认值,
45 d.crdate AS 创建时间,
46 CASE WHEN a.colorder = 1 THEN d.refdate ELSE NULL END AS 更改时间
47 FROM dbo.syscolumns a
48 LEFT OUTER JOIN dbo.systypes b ON a.xtype = b.xusertype
49 INNER JOIN dbo.sysobjects d ON a.id = d.id AND d.xtype = 'U' AND d.status >= 0
50 LEFT OUTER JOIN dbo.syscomments e ON a.cdefault = e.id
51 LEFT OUTER JOIN sys.extended_properties g ON a.id = g.major_id AND a.colid = g.minor_id AND g.name = 'MS_Description'
52 LEFT OUTER JOIN sys.extended_properties f ON d.id = f.major_id AND f.minor_id = 0 AND f.name = 'MS_Description'
53 ORDER BY d.name, 字段序号
54 --2. SqlServer数据库字典--索引.sql
55 SELECT TOP 100 PERCENT --a.id,
56 CASE WHEN b.keyno = 1 THEN c.name ELSE '' END AS 表名,
57 CASE WHEN b.keyno = 1 THEN a.name ELSE '' END AS 索引名称, d.name AS 列名,
58 b.keyno AS 索引顺序, CASE indexkey_property(c.id, b.indid, b.keyno, 'isdescending')
59 WHEN 1 THEN '降序' WHEN 0 THEN '升序' END AS 排序, CASE WHEN p.id IS NULL
60 THEN '' ELSE '√' END AS 主键, CASE INDEXPROPERTY(c.id, a.name, 'IsClustered')
61 WHEN 1 THEN '√' WHEN 0 THEN '' END AS 聚集, CASE INDEXPROPERTY(c.id,
62 a.name, 'IsUnique') WHEN 1 THEN '√' WHEN 0 THEN '' END AS 唯一,
63 CASE WHEN e.id IS NULL THEN '' ELSE '√' END AS 唯一约束,
64 a.OrigFillFactor AS 填充因子, c.crdate AS 创建时间, c.refdate AS 更改时间
65 FROM dbo.sysindexes a INNER JOIN
66 dbo.sysindexkeys b ON a.id = b.id AND a.indid = b.indid INNER JOIN
67 dbo.syscolumns d ON b.id = d.id AND b.colid = d.colid INNER JOIN
68 dbo.sysobjects c ON a.id = c.id AND c.xtype = 'U' LEFT OUTER JOIN
69 dbo.sysobjects e ON e.name = a.name AND e.xtype = 'UQ' LEFT OUTER JOIN
70 dbo.sysobjects p ON p.name = a.name AND p.xtype = 'PK'
71 WHERE (OBJECTPROPERTY(a.id, N'IsUserTable') = 1) AND (OBJECTPROPERTY(a.id,
72 N'IsMSShipped') = 0) AND (INDEXPROPERTY(a.id, a.name, 'IsAutoStatistics') = 0)
73 ORDER BY c.name, a.name, b.keyno
74 --3. SqlServer数据库字典--表.视图.函数.存储过程.触发器.主键.外键.约束.规则.sql
75 SELECT DISTINCT
76 TOP 100 PERCENT isnull(p.name,'') AS 父对象, o.xtype,
77 CASE o.xtype WHEN 'C' THEN 'CHECK 约束' WHEN 'D' THEN '默认值或DEFAULT约束'
78 WHEN 'F' THEN 'FOREIGNKEY约束' WHEN 'L' THEN '日志' WHEN 'FN' THEN '标量函数'
79 WHEN 'IF' THEN '内嵌表函数' WHEN 'P' THEN '存储过程' WHEN 'PK' THEN 'PRIMARYKEY约束'
80 WHEN 'RF' THEN '复制筛选存储过程' WHEN 'S' THEN '系统表' WHEN 'TF' THEN '表函数'
81 WHEN 'TR' THEN '触发器' WHEN 'U' THEN '用户表' WHEN 'UQ' THEN 'UNIQUE 约束'
82 WHEN 'V' THEN '视图' WHEN 'X' THEN '扩展存储过程' WHEN 'R' THEN '规则' ELSE NULL
83 END AS 类型, o.name AS 对象名, o.crdate AS 创建时间, o.refdate AS 更改时间,
84 c.text AS 声明语句,OBJECTPROPERTY(o.id, N'IsMSShipped')
85 FROM dbo.sysobjects o Left JOIN
86 dbo.sysobjects p ON o.parent_obj = p.id LEFT OUTER JOIN
87 dbo.syscomments c ON o.id = c.id
88 WHERE --(o.xtype IN ('C','D','F','PK','UQ','L','FN','IF','TF','TR','P','R','RF','X','S','U','V')) AND
89 (OBJECTPROPERTY(o.id, N'IsMSShipped') = 0) AND (isnull(p.name,'') <> N'dtproperties')
90 ORDER BY o.xtype DESC
