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 aleft join    systypes bon    a.xusertype=b.xusertypeinner 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 joinsys.extended_properties g on    a.id=G.major_id and a.colid=g.minor_idleft join sys.extended_properties f on    d.id=f.major_id and f.minor_id=0--where   d.name='Product' --特定数据特定表名--order by  a.id,a.colorder   --如果只查询指定表,加上此条件order by    a.id,a.colorder