有没有可能通过代码得到数据库字段的长度之类的信息


比如说tableA   的   字段text在设计时为varchar（30）   那能通过代码得到该字段的设定长度嘛（就是30）.

------解决方案--------------------
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 sysproperties g on a.id=g.id and a.colid=g.smallid
left join sysproperties f on d.id=f.id and f.smallid=0
--where d.name= '要查询的表 ' --如果只查询指定表,加上此条件
order by a.id,a.colorder