请教一个关于游标中动态SQL的问题?
create procedure test@fld varchar(100)asdeclare @sql nvarchar(500)set @sql='declare xyz cursor fast_forward for select ' + @fld + ' from abc'exec sp_executesql @sqlopen xyzfetch next from xyz into ....(@fld是所要查询的列的字符串,是未知个数的,这里应该怎么写呢?).....................