摘要: 176编写一个 SQL 查询,获取 Employee 表中第二高的薪水(Salary) 。 select IFNULL((SELECT distinct salary from employee order by salary desc limit 1,1),NULL)AS SECONDHIGHES 阅读全文
posted @ 2019-06-11 17:07 NeoZy 阅读(174) 评论(0) 推荐(0) 编辑