db.models.Variance

class Variance(expression, sample=False, **extra) [source]

Returns the variance of the data in the provided expression.

Default alias: <field>__variance
Return type: float

Has one optional argument:

sample: By default, Variance returns the population variance. However, if sample=True, the return value will be the sample variance.

SQLite

SQLite doesn’t provide Variance out of the box. An implementation is available as an extension module for SQLite. Consult the SQlite documentation for instructions on obtaining and installing this extension.

Links:

https://docs.djangoproject.com/en/1.10/ref/models/querysets/#django.db.models.Variance

doc_Django

2016-10-09 18:36:26

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