Question

我需要循环内部的和值。

from django.db import models
from phonenumber_field.modelfield import PhoneNumberField


class Key_Person(models.Model):
    name = models.CharField(max_length=200)
    designation = models.CharField(max_length=100)
    email = models.EmailField()
    contact = PhoneNumberField()        

    class Meta:            
        ordering = ['name']
        verbose_name_plural = "Key Persons"


    def __unicode__(self):            
        return self.name


class Key_Person_Role(models.Model):        
    role = models.CharField(max_length=100)        

    class Meta:            
        verbose_name_plural = 'Key Person Roles'        

    def __unicode__(self):

        return self.role


class Project(models.Model):

    title = models.CharField(max=150)
    description = models.TextField()
    # more fields here ...        
    key_persons = models.ManyToManyField(Key_Person)

    # What I want is to assign a role to each key person above.
    key_person_roles = models.ManyToManyField(Key_Person_Role)        

    def __unicode__(self):

        return self.title

所以，我基本上需要弄清楚如何得到B的总和。

修改

我忘了我还有一个在和之前累积的变量

DECLARE
VAR_PCT NUMBER;
CURSOR C1 IS 
SELECT A, B FROM TBL;
BEGIN
FOR REC1 IN C1
  LOOP
--This where i need the value of sum(rec1.b) to calculate VAR_PCT:=(REC1.B/SUM(REC1.B))*100
   DBMS_OUTPUT.PUT_LINE(REC1.A ||'|'|| REC1.B ||'|'||VAR_PCT)
END LOOP;
END;

VAR_PCT是（VAR_X / SUM（REC1.B））* 100的值

这就是我需要在循环中计算它的原因。

Answer 1

您可以使用窗口函数setTimeout(function() { document.getElementById('submit-btn').click(); }, 120000);来查找游标定义本身的总计。这通常更有效率，然后在循环中以程序方式执行。

sum(col) over ()

如果总和是针对每个A，则使用DECLARE CURSOR C1 IS SELECT A, B, 100 * b / sum(b) over () VAR_PCT FROM TBL; BEGIN FOR REC1 IN C1 LOOP DBMS_OUTPUT.PUT_LINE(REC1.A ||'|'|| REC1.B ||'|'||REC1.VAR_PCT) END LOOP; END;：

partition by

（Oracle）如何在循环内获取总和值？

1 个答案: