在2005下查看数据字典的sql

 use  dbName
SELECT
 (case when a.colorder=1 then d.name else '' end) 表名, a.colorder 字段序号,
 a.name 字段名,
 (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) 标识, (case when (SELECT count(*)
     FROM sysobjects
     WHERE
 (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)))))))
 AND (xtype = 'PK'))>0 then '√' else '' end) 主键, b.name 类型,
 a.length 占用字节数, COLUMNPROPERTY(a.id,a.name,'PRECISION') as 长度,
 isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小数位数,
 (case when a.isnullable=1 then '√'else '' end) 允许空,
 isnull(e.text,'') 默认值, isnull(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 syscomments e on a.cdefault=e.id
left join sys.extended_properties g on a.id=g.major_id AND a.colid = g.minor_id
where d.name = '<--要查询的表名->'
order by a.id,a.colorder