SQL Server表和字段的说明

1. 增加字段说明

EXEC sp_addextendedproperty
    'MS_Description',
    'some description',
    'user',
     dbo,
    'table',
     table_name,
    'column',
     column_name

• Some Description ， 是要增加的说明内容
• table_name, 是表名
• column_name , 是字段名

2. 增加表的说明

EXEC sp_addextendedproperty
    'MS_Description',
    'some description',
    'user',
     dbo,
    'table',
     table_name

参数说明同上

3. 取得字段说明内容

  

SQL Server 2000

SQL Server 2005 ( 包括 express)

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     sysproperties s ON     s.id = OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME)     AND s.smallid = 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 = 'table_name' ORDER BY     i_s.TABLE_NAME, i_s.ORDINAL_POSITION

SELECT     [Table Name] = OBJECT_NAME(c.object_id),     [Column Name] = c.name,     [Description] = ex.value FROM     sys.columns c LEFT OUTER JOIN     sys.extended_properties ex ON     ex.major_id = c.object_id     AND ex.minor_id = c.column_id     AND ex.name = 'MS_Description' WHERE     OBJECTPROPERTY(c.object_id, 'IsMsShipped')=0     -- AND OBJECT_NAME(c.object_id) = 'your_table' ORDER     BY OBJECT_NAME(c.object_id), c.column_id

4. 取得表说明

  

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

FROM syscolumns a
       inner join sysobjects d
          on a.id = d.id
             and d.xtype = 'U'
             and d.name <> 'sys.extended_properties'
       left join sys.extended_properties   f
         on a.id = f.major_id
            and f.minor_id = 0
Where (case when a.colorder = 1 then d.name else '' end) <>''

 

SELECT

        (case when a.colorder=1 then d.name else '' end) 表名,

        a.colorder 字段序号,

        a.name 字段名,

       g.[value] AS 字段说明

FROM syscolumns a left join systypes b

on a.xtype=b.xusertype

inner join sysobjects d

on a.id=d.id and d.xtype='U' and d.name<>'dtproperties'

left join sys.extended_properties g

on a.id=g.major_id AND a.colid = g.minor_id

WHERE d.[name] <>'table_desc' --你要查看的表名，注释掉，查看当前数据库所有表的字段信息

order by a.id,a.colorder

--创建表及描述信息

create   table   表(a1   varchar(10),a2   char(2))

--为表添加描述信息
EXECUTE   sp_addextendedproperty   N'MS_Description',   '人员信息表',   N'user',   N'dbo',   N'table',   N'表',   NULL,   NULL

--为字段a1添加描述信息
EXECUTE   sp_addextendedproperty   N'MS_Description',   '姓名',   N'user',   N'dbo',   N'table',   N'表',   N'column',   N'a1'

--为字段a2添加描述信息
EXECUTE   sp_addextendedproperty   N'MS_Description',   '性别',   N'user',   N'dbo',   N'table',   N'表',   N'column',   N'a2'
--更新表中列a1的描述属性：
EXEC   sp_updateextendedproperty   'MS_Description','字段1','user',dbo,'table','表','column',a1

--删除表中列a1的描述属性：
EXEC   sp_dropextendedproperty   'MS_Description','user',dbo,'table','表','column',a1

--删除测试
drop   table   表