由于某些原因，输出会一直告诉我，即使我不使用组功能，也无效使用它

Question

这里是显示错误idk的代码段，为什么因为Im不使用组函数

select concat('$',max(employees.salary)), concat('$',min(employees.Salary)), concat('$',format(avg(employees.salary),2)), employees.job
from employees
where avg(employees.salary) > 3000; ```

Answer 1

SELECT
    job,
    CONCAT('$', MAX(salary)),
    CONCAT('$', MIN(salary)),
    CONCAT('$', FORMAT(AVG(salary), 2))
FROM employees
GROUP BY
    job
HAVING
    AVG(salary) > 3000;

Answer 2

select 
      concat('$',max(employees.salary)), 
      concat('$',min(employees.Salary)),
      concat('$',format(avg(employees.salary),2)), 
      employees.job
   from 
      employees
   group by
      employees.job
   having
      avg(employees.salary) > 3000