Sql Server 2005 获取表结构信息

SELECT 表名   = CASE a.colorder WHEN 1 THEN c.name ELSE '' END,
       序     = a.colorder,
       字段名 = a.name,
       标识   = CASE COLUMNPROPERTY(a.id,a.name,'IsIdentity') WHEN 1 THEN '√' ELSE '' END,
       主键   = CASE
  WHEN EXISTS ( SELECT *
                  FROM sysobjects
                 WHERE xtype='PK'
                   AND name IN (SELECT [name]
                                  FROM sysindexes
                                 WHERE id=a.id
                                   AND indid IN (SELECT indid
                                                   FROM sysindexkeys
                                                  WHERE id=a.id
                                                    AND colid IN (SELECT colid
                                                                    FROM syscolumns
                                                                   WHERE id=a.id
                                                                     AND name=a.name))))
  THEN '√' ELSE '' END,
     类型 = b.name,
     字节数 = a.length,
     长度   = COLUMNPROPERTY(a.id,a.name,'Precision'),
     小数   = CASE ISNULL(COLUMNPROPERTY(a.id,a.name,'Scale'),0) WHEN 0 THEN '' ELSE CAST(COLUMNPROPERTY(a.id,a.name,'Scale') AS VARCHAR) END,
     允许空 = CASE a.isnullable WHEN 1 THEN '√' ELSE '' END,
     默认值 = ISNULL(d.[text],''),
     说明   = ISNULL(e.[value],'')
 FROM syscolumns a
 LEFT JOIN systypes b ON a.xtype=b.xusertype
INNER JOIN sysobjects c ON a.id=c.id AND c.xtype='U' AND c.name<>'dtproperties'
LEFT  JOIN syscomments d ON a.cdefault=d.id
LEFT  JOIN sys.extended_properties e ON a.id=e.class AND a.colid=e.minor_id
ORDER BY c.name, a.colorder