找出那些 没有被 id = 2 的客户 推荐 的客户的姓名。 建表插入数据: Create table If Not Exists Customer (id int, name varchar(25), referee_id int)Truncate table Customerinsert into Customer (id, name, referee_id) values ('1',
584.How is block-change tracking enabled? A. With alter database enable block change tracking B. With alter system enable block change tracking C. With an init.ora parameter change D. With an spfi