66a7a4b294
Support to calculate the exact percentile value array of numeric column `col` at the given percentage(s).
1.6 KiB
1.6 KiB
title, language
| title | language |
|---|---|
| PERCENTILE | en |
PERCENTILE
Description
Syntax
PERCENTILE(expr, DOUBLE p)
Calculate the exact percentile, suitable for small data volumes. Sort the specified column in descending order first, and then take the exact p-th percentile. The value of p is between 0 and 1
Parameter Description: expr: required. The value is an integer (bigint at most). p: The exact percentile is required. The value is [0.0,1.0]
example
MySQL > select `table`, percentile(cost_time,0.99) from log_statis group by `table`;
+---------------------+---------------------------+
| table | percentile(`cost_time`, 0.99)|
+----------+--------------------------------------+
| test | 54.22 |
+----------+--------------------------------------+
## keyword
PERCENTILE