SqlServer字段说明查询

??SELECT t.[name] AS 表名,c.[name] AS 字段名,cast(ep.[value] 
  as varchar(100)) AS [字段说明]
  FROM sys.tables AS t
  INNER JOIN sys.columns 
  AS c ON t.object_id = c.object_id
   LEFT JOIN sys.extended_properties AS ep 
  ON ep.major_id = c.object_id AND ep.minor_id = c.column_id WHERE ep.class =1 
  AND t.name='TableName'

TableName为表名