sql里 假设表的格式是 员工姓名 工龄 所在部门 怎么输出 每个部门工龄最大的人的姓名
推荐回答(3个)
SELECT 员工姓名,工龄
FROM 员工表
WHERE (部门编号,工龄) IN
(SELECT 部门编号, MAX(工龄)AS 工龄
FROM 员工表
GROUP BY 部门编号)
以上SQL可以取得员工表中各部门工龄最大的员工的姓名,如果有多个工龄相同的人,都会输出
SELECT 员工姓名, MAX(工龄)
FROM 员工表
GROUP BY 部门编号, 员工姓名
select Max 工龄 from 表 group by 部门
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