SQL2005查询表结构的SQL语句使用分享

select   
(case when a.colorder=1 then d.name else '' end) as 表名,--如果表名相同就返回空   syscolumns(表字段信息表) a  sysobjects d
     a.colorder as 字段序号,  
     a.name as 字段名,  
     (case when columnproperty( a.id,a.name, 'isidentity' )=1 then '√' else '' end) as 标识,   --返回isidentity的值，isidentity只有两个值：0、1
     (case when (select count(*) from sysobjects--查询主键  
                     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) as 主键,--查询主键end  
b.name as 类型,   --systypes b
a.length as 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) as 允许空,  
isnull(e.text,'' ) as 默认值,   --syscomments e
isnull(g.[value],'' ) as 字段说明    --sys.extended_properties g (字段信息表)
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='systempara' --所要查询的表  
order by a.id,a.colorder