读取数据库结构的sql语句

SELECT 
    表名       = case when a.colorder=1 then d.name else '' end,  
    表说明     = case when a.colorder=1 then cast (isnull(f.value,'') as varchar(2000)) 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   = cast(isnull(g.[value],'') as varchar(2000))  
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='C_PARTY_SPREADER'    --如果只查询指定表,加上此条件  
order by 
    a.id,a.colorder