题解 | #查找薪水记录超过15次的员工号emp_no以及其对应的记录次数t#
查找薪水记录超过15次的员工号emp_no以及其对应的记录次数t
http://www.nowcoder.com/practice/6d4a4cff1d58495182f536c548fee1ae
确定属性：
select emp_no, count(distinct from_date) as t
确定数据来源：
from salaries
数据满足的条件：
group by emp_no having t>15;
具体代码：
select emp_no, count(distinct from_date) as t
from salaries
group by emp_no
having t>15;
select emp_no, count(distinct from_date) as t
from salaries
group by emp_no
having t>15;
问题：薪资涨幅，怎么确定涨幅？薪资变化是下跌怎么写代码？
