create table test1(
mID int primary key,
mName varchar(20) );
现在假设我不知道表的字段类型,欲查询之,高手指教。
分不多, 见谅
5 个解决方案
#1
--SQL2005
SELECT
表名=case when a.colorder=1 then d.name 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.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 d.id=g.major_id and a.colid=g.minor_id
--取消下面的注释则只返回有描述的字段
--where g.name='MS_Description'
order by a.id,a.colorder
#2
select * from sys.columns
#3
select column_name,data_type from information_schema.columns
where table_name = 'test1'
#4
select o.name,a.name,b.name from sys.columns a left join sys.objects o on a.object_id= o.object_id
left join sys.types b on a.system_type_id = b. system_type_id
where o.name= 'T_B' and b.name <>'sysname'
#5
神一般
#1
--SQL2005
SELECT
表名=case when a.colorder=1 then d.name 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.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 d.id=g.major_id and a.colid=g.minor_id
--取消下面的注释则只返回有描述的字段
--where g.name='MS_Description'
order by a.id,a.colorder
#2
select * from sys.columns
#3
select column_name,data_type from information_schema.columns
where table_name = 'test1'
#4
select o.name,a.name,b.name from sys.columns a left join sys.objects o on a.object_id= o.object_id
left join sys.types b on a.system_type_id = b. system_type_id
where o.name= 'T_B' and b.name <>'sysname'
#5
神一般