select 字段名=a.name, 类型=b.name, 占用字节数=a.length FROM syscolumns a Inner join systypes b on a.xtype=b.xusertype where a.id=object_id('表名') and a.name='列名'
--你有空去研究下这个吧,不知道最初是哪儿的SELECT (case when a.colorder=1 then d.name else '' end) N'表名', a.colorder N'字段序号', a.name N'字段名', (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) N'标识', (case when (SELECT count(*) FROM sysobjects 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) N'主键', b.name N'类型', a.length N'占用字节数', COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'长度', isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'小数位数', (case when a.isnullable=1 then '√'else '' end) N'允许空', isnull(e.text,'') N'默认值', isnull(g.[value],'') AS N'字段说明' 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 sysproperties g on a.id=g.id AND a.colid = g.smallid order by object_name(a.id),a.colorder
有空看看SQLSERVER自带的系统表是干什么的就没这么多问题了.
最简单最省心的办法是在客户端使用SQL-DMO对象获取列信息。 Dim cDataType = "" Dim oSqlServer as new SQLDMO.SQLServer2 oSqlServer.LoginSecure = vbTrue ----连接到SQLSERVER实例 oSqlServer.CONNECT("计算机名") /*连接到默认实例。或"计算机名\实例名"到命名实例*/ cDataType = oSqlServer.DataBases("数据库名").Tables("表名").Columns("列名").datatype --列名称,列长度,列精度,是否允许空值……具体可查看SQLSERVER帮助中的SQL-DMO帮助。
FROM syscolumns a Inner join systypes b on a.xtype=b.xusertype
where a.id=object_id('表名') and a.name='列名'
(case when a.colorder=1 then d.name else '' end) N'表名',
a.colorder N'字段序号',
a.name N'字段名',
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else ''
end) N'标识',
(case when (SELECT count(*)
FROM sysobjects
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) N'主键',
b.name N'类型',
a.length N'占用字节数',
COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'长度',
isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'小数位数',
(case when a.isnullable=1 then '√'else '' end) N'允许空',
isnull(e.text,'') N'默认值',
isnull(g.[value],'') AS N'字段说明'
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 sysproperties g
on a.id=g.id AND a.colid = g.smallid
order by object_name(a.id),a.colorder
Dim cDataType = ""
Dim oSqlServer as new SQLDMO.SQLServer2
oSqlServer.LoginSecure = vbTrue
----连接到SQLSERVER实例
oSqlServer.CONNECT("计算机名") /*连接到默认实例。或"计算机名\实例名"到命名实例*/
cDataType = oSqlServer.DataBases("数据库名").Tables("表名").Columns("列名").datatype
--列名称,列长度,列精度,是否允许空值……具体可查看SQLSERVER帮助中的SQL-DMO帮助。