数据库SQL实践21：查找全部员工自入职以来的薪水涨幅状况

思想：sql 题目要求查找全部员工自入职以来的薪水涨幅状况，给出员工编号emp_no以及其对应的薪水涨幅growth，并按照growth进行升序。code 首先经过条件employees as e inner join salaries as new on e.emp_no = new.emp_no and new.to_date='9999-01-01'实现employees表和salaries

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