显示数据库中表字段的信息

SELECT 
表名 = d.name ,
表说明 = case when a.colorder=1 then isnull(f.value,'') else '' end,
字段序号 = a.colorder,
字段名 = a.name,
标识 = case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end,
主键 = case when exists(SELECT 1 FROM sysobjects where xtype='PK' and parent_obj=a.id and name in (
SELECT name FROM sysindexes WHERE indid in( SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid))) then '√' else '' end,
类型 = b.name,
占用字节数 = a.length,
长度 = COLUMNPROPERTY(a.id,a.name,'PRECISION'),
小数位数 = isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
允许空 = case when a.isnullable=1 then '√'else '' end,
默认值 = isnull(e.text,''),
字段说明 = isnull(g.[value],'')
FROM 
syscolumns a
left join 
systypes b 
on 
a.xusertype=b.xusertype
inner join 
sysobjects d 
on 
a.id=d.id 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 
left join

sys.extended_properties f
on 
d.id=f.major_id and f.minor_id=0