Package com.gpudb.protocol
Class AggregateStatisticsRequest.Stats
java.lang.Object
com.gpudb.protocol.AggregateStatisticsRequest.Stats
Enclosing class:
A set of string constants for the
AggregateStatisticsRequest parameter stats.
Comma separated list of the statistics to calculate, e.g. “sum,mean”.
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final StringNumber of unique values in the column(s).static final StringNumber of objects (independent of the given column(s)).static final StringEstimate (via hyperloglog technique) of the number of unique values in the column(s).static final StringKurtosis (fourth standardized moment).static final StringMaximum value of the column(s).static final StringArithmetic mean (average), equivalent to sum/count.static final StringMinimum value of the column(s).static final StringEstimate (via t-digest) of the given percentile of the column(s) (percentile(50.0) will be an approximation of the median).static final StringEstimate (via t-digest) of the percentile rank of the given value in the column(s) (if the given value is the median of the column(s), percentile_rank(<median>) will return approximately 50.0).static final StringSkewness (third standardized moment).static final StringSample standard deviation (denominator is count-1).static final StringSum of all values in the column(s).static final StringUnbiased sample variance (denominator is count-1).static final StringWeighted arithmetic mean (using the optionWEIGHT_COLUMN_NAMEas the weighting column).
Field Details
WEIGHTED_AVERAGE
Weighted arithmetic mean (using the optionWEIGHT_COLUMN_NAMEas the weighting column).See Also: