Class StdDevSAggregator<V extends java.lang.Number>

  • All Implemented Interfaces:
    java.io.Externalizable, java.io.Serializable, Aggregator<V,​java.lang.Double,​VarPAggregator<V>>

    public class StdDevSAggregator<V extends java.lang.Number>
    extends VarSAggregator<V>

    This class implements the SQL Standard STDDEV_SAMP() aggregator, computing a sample's standard deviation. It relies on VarSAggregator to compute the sample's variance and then applies the textbook definition of standard deviation:

    var_samp()
     
    See Also:
    Serialized Form
    • Constructor Detail

      • StdDevSAggregator

        public StdDevSAggregator()
    • Method Detail

      • terminate

        public java.lang.Double terminate()
        Description copied from interface: Aggregator
        Return the result scalar value
        Specified by:
        terminate in interface Aggregator<V extends java.lang.Number,​java.lang.Double,​VarPAggregator<V extends java.lang.Number>>
        Overrides:
        terminate in class VarPAggregator<V extends java.lang.Number>