摘要: select name ,population from bbc where name='France' union allselect name ,population from bbc where name='Germany'union allselect name ,population from bbc where name='Italy'显示结果其中关键字为:union all ,它可以把查出的信息归到下一行。 阅读全文
posted @ 2013-10-18 09:21 岳帅超 阅读(362) 评论(0) 推荐(0)