判断表是否有identity列

Select OBJECTPROPERTY(OBJECT_ID('zz_temp230501'),'TableHasIdentity') // 为 1 有, 0 无

--全的
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.id and a.colid=g.smallid left join sysproperties f on d.id=f.id and f.smallid=0 where d.name='zz_temp230501' --如果只查询指定表,加上此条件order by a.id,a.colorder
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='zz_temp230501' --如果只查询指定表,加上此条件order by a.id,a.colorder
order by a.id, a.colorder

查找出标识列：
select name from syscolumns
where id = object_id('test') and columnproperty( id,name,'isidentity')=1其中test为表名