jobs3 WHERE LOCATE('-',salary) = 0; -- 添加平均工资列 ALTER TABLE jobs3 ADD COLUMN avg_salary DECIMAL ( 6, 2 ); -- 计算平均工资 UPDATE jobs3 SET avg_salary = ( CASE WHEN LOCATE('-',salary) = 0 THEN (SUBSTRING_INDEX(salary,'k',1) * IF(salaryMonth = '0',12,salaryMonth) ...
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The Best Machine Learning Jobs in 2025 and How to Land Them Explore the top machine learning jobs in 2025. Discover roles, required skills, and salary insights to advance your career in the booming AI industry! Natassha Selvaraj 19 min blog The Top Data Science Jobs of the Future This arti...
SELECTmax(avg(salary)) FROM employees GROUPBY job_id ) 3). 查询出 2) 对应的 job 信息 [sql]view plaincopy SELECT * FROM jobs WHERE job_id = ( SELECT job_id FROM employees GROUPBY job_id HAVINGavg(salary) = ( SELECTmax(avg(salary)) FROM employees GROUPBY job_id ) ) 8.查询平均工资...
复制SELECTj.*FROM`jobs` jJOIN(SELECT`job_id`FROM`employees`GROUPBY`job_id`ORDERBYAVG(`salary`)DESCLIMIT1) ag_depONj.`job_id`=ag_dep.`job_id` 案例:查询平均工资高于公司平均工资的部门有哪些? 复制SELECT`department_id`,AVG(`salary`)FROM`employees`GROUPBY`department_id`HAVINGAVG(`salary`)>...
SELECTj.job_title,CONCAT(e.first_name,' ',e.last_name)ASEmployee_name,j.max_salary-e.salaryASsalary_differenceFROMemployees eJOINjobs jONe.job_id=j.job_id; Copy Explanation: This query uses an INNER JOIN to combine the 'employees' and 'jobs' tables based on their "job_id". It selec...
Show the department number, name, number of employees, and average salary of all departments, --together with the names, salaries, and jobs of the employees working in each department --查询所有部门的id,名字,员工数量,平均薪水,还有在各个部门工作的员工的信息。select d.department_id, d.avg_...
1.select子句中尽量避免使用* select子句中，*是选择全部数据的意思。比如语句：“select * from 成绩表...
以下查询使用加密的Salary列在Employees和Jobs表之间执行联接。 该查询检索薪水未处于其职位薪水范围内的员工。 SQL SELECT*FROM[HR].[Employees] eJOIN[HR].[Jobs] jONe.[JobID] = j.[JobID]ANDe.[Salary] > j.[MaxSalary]ORe.[Salary] < j.[MinSalary]; GO ...
【数据集】:https://www.kaggle.com/code/zabihullah18/data-science-salary-trend 1. 不同经验水平的平均工资是什么样的? 在这个SQL查询中,本文正在找出不同经验水平的平均工资。GROUP BY子句按经验水平对数据进行分组,AVG函数计算每个组的平均工资。