sql语句查询表中列的详细信息

SELECT syscolumns.name AS COLUMN_NAME,
systypes.name AS DATA_TYPE, syscolumns.length as CHARACTER_MAXIMUM_LENGTH,
sys.extended_properties.[value] AS COLUMN_DESCRIPTION, syscomments.text as
COLUMN_DEFAULT,syscolumns.isnullable as IS_NULLABLE from syscolumns
INNER JOIN systypes
ON syscolumns.xtype = systypes.xtype
LEFT JOIN sysobjects ON syscolumns.id = sysobjects.id
LEFT OUTER JOIN sys.extended_properties ON
( sys.extended_properties.minor_id = syscolumns.colid
AND sys.extended_properties.major_id = syscolumns.id)
LEFT OUTER JOIN syscomments ON syscolumns.cdefault = syscomments.id
WHERE syscolumns.id IN
(SELECT id from SYSOBJECTS WHERE xtype = 'U') AND (systypes.name <> 'sysname'
and Sysobjects.name='grouponproduct')
ORDER BY syscolumns.colid