sql server 查出数据库表结构

SELECT    
    表名       = case when a.colorder=1 then d.name else '' end,   
    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.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     
left join sys.extended_properties f   
on d.id=f.major_id and f.minor_id=0   
--where d.name= 'Activities'    --如果只查询指定表,加上此条件   
order by a.id,a.colorder