Class: Babik::QuerySet::StdDev

Inherits:

PostgresMySQLAggregationFunction

• Object
• AbstractAggregationFunction
• PostgresMySQLAggregationFunction
• Babik::QuerySet::StdDev

Defined in:

lib/babik/queryset/components/aggregation.rb

Overview

Standard deviation of a set of values

Constant Summary

SQL_OPERATION =

'STDDEV_POP(?field)'

Instance Attribute Summary

Attributes inherited from AbstractAggregationFunction

#field_name, #model, #selection

Method Summary

Methods inherited from PostgresMySQLAggregationFunction

#sql_operation

Methods inherited from AbstractAggregationFunction

db_adapter, #initialize, #left_joins_by_alias, #prepare, #sql

Constructor Details

This class inherits a constructor from Babik::QuerySet::AbstractAggregationFunction