lunzi

SELECT Sysobjects.name AS TABLE_NAME, syscolumns.Id, syscolumns.name AS COLUMN_NAME,
systypes.name AS DATA_TYPE, syscolumns.length as CHARACTER_MAXIMUM_LENGTH,
sysproperties.[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 sysproperties ON
   ( sysproperties.smallid = syscolumns.colid
     AND sysproperties.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')
   ORDER BY syscolumns.colid

参考资料一
参考资料二