quantilesExactExclusive

Introduced in: v20.1

Exactly computes multiple quantiles of a numeric data sequence at different levels simultaneously using the exclusive method.

This function is equivalent to quantileExactExclusive but allows computing multiple quantile levels in a single pass, which is more efficient than calling individual quantile functions.

This function uses the exclusive method for calculating quantiles, as described in the R-6 method. This is equivalent to PERCENTILE.EXC Excel function.

To get exact values, all the passed values are combined into an array, which is then partially sorted. The sorting algorithm's complexity is O(N·log(N)), where N = std::distance(first, last) comparisons.

Syntax

quantilesExactExclusive(level1, level2, ...)(expr)

Parameters

level — Levels of quantiles. Constant floating-point numbers from 0 to 1 (exclusive). We recommend using level values in the range of (0.01, 0.99). Float*

Arguments

expr — Expression over the column values resulting in numeric data types, Date or DateTime. (U)Int* or Float* or Decimal* or Date or DateTime

Returned value

Array of quantiles of the specified levels in the same order as the levels were specified. Array(Float64)

Examples

Computing multiple exact exclusive quantiles

CREATE TABLE num AS numbers(1000);
SELECT quantilesExactExclusive(0.25, 0.5, 0.75, 0.9, 0.95, 0.99, 0.999)(number) FROM num;

┌─quantilesExactExclusive(0.25, 0.5, 0.75, 0.9, 0.95, 0.99, 0.999)(number)─┐
│ [249.25,499.5,749.75,899.9,949.95,989.99,998.999]                        │
└──────────────────────────────────────────────────────────────────────────┘

quantilesExactExclusive​

quantilesExactExclusive