select
object_name(i.id) AS TableName,
c.name as FieldName,
I.Name AS IndexName ,
objectproperty(object_id(i.name),'IsPrimarykey') AS IsPrimaryKey
from sysindexkeys as ik
inner join sysindexes as i
on ik.id = i.id
and ik.indid = i.indid
inner join syscolumns as c
on ik.id = c.id
and ik.colid=c.colid
where objectproperty(i.id,'IsUserTable')=1
AND c.name = @YourFieldName