取表结构 t-sql

select b.[value] from sys.columns a left join sys.extended_properties b on a.object_id=b.major_id 
and a.column_id=b.minor_id inner join sysobjects c on a.column_id=c.id 
and a.[name]='列名' and c.[name]='表名' 
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 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='order_detail' --如果只查询指定表,加上此条件 
order by a.id,a.colorder