1.
select project.name,sum(employee.salary) from project,employee,projectemployee
where project.projectid=projectemployee.projectid and employee.employeeid=projectemployee.employeeid
group by project.name
2.
没有
3.
粗看了一下,正确
select project.name,sum(employee.salary) from project,employee,projectemployee
where project.projectid=projectemployee.projectid and employee.employeeid=projectemployee.employeeid
group by project.name
2.
没有
3.
粗看了一下,正确
解决方案 »
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