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Categories: Window

PERCENT_RANK

Returns the relative rank of the current row in the partition based on the ORDER BY clause. The displayed percentage ranges from 0.0 to 1.0.

Syntax​

PERCENT_RANK() OVER ( [PARTITION BY partition_expression] [ORDER BY order_expression]) → double​

  • partition_expression (optional): An expression that groups rows into partitions.
  • order_expression: An expression that specifies the order of the rows within each partition.

Examples

PERCENT_RANK example 
SELECT "Category", 
  "Descript", 
  "DayOfWeek",
  PERCENT_RANK() 
    OVER (
      PARTITION BY "Category" 
      ORDER BY "DayOfWeek")
FROM Samples."samples.dremio.com"."SF_incidents2016.json"
-- Category, Descript, DayOfWeek, EXPR$3
-- ARSON, ARSON, Friday, 0.0 
-- ARSON, ARSON, Monday, 0.1368421052631579