摘要: 最大值:select max(num) from table第二大值:select max(num) from table where num not in(select max(num) from table)第三大值:select max(num) from table where num no 阅读全文
posted @ 2016-02-29 20:22 zhou09 阅读(454) 评论(0) 推荐(0) 编辑