select trunc(5/10,2)*100||'%' from dual
2：select e.manager_id,
row_number() over(partition by e.manager_id order by e.manager_id) RR
from employees e
3：
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select trunc(5/10,2)*100||'%' from dual
2：select e.manager_id,
row_number() over(partition by e.manager_id order by e.manager_id) RR
from employees e
3：
相关文章：