Sql 随机更新一条数据返回更新数据的ID编号

DECLARE @parimaryTable（临时表）  Table(prizecode varchar(50));
update top (1)  数据表 set 字段a='数值' ,字段b=‘数值’ output deleted.prizecode into @parimaryTable（临时表）  where  条件字段    ; select * from @parimaryTable

样例

public string GetUserPrizeChangeListRamdom(string customerId, int userid)
        {
            if (!customerId.Equals(""))
                using (var db = new SqlServer())
                {
                    var updateSql = string.Format(@"DECLARE @parimaryTable  Table(prizecode varchar(50));
update top (1)  UserPrizeChangeList set consumerid='{0}' ,userid={1},status=1,usetime=getdate() output deleted.prizecode into @parimaryTable where status=0  ; select * from @parimaryTable", db.InjectReplace(customerId), userid);
                    return db.GetScalar<string>(updateSql);
                }
            else
                return null;
        }