Categories: Window

DENSE_RANK

Returns the rank of the current row within its partition and ordering. Rows that are equal will have the same rank.

Syntax

DENSE_RANK() OVER ( [PARTITION BY partition_expression] [ORDER BY order_expression]) → bigint

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

Examples

SELECT "Category", 
  "Descript", 
  "DayOfWeek",
  DENSE_RANK() 
    OVER (
      PARTITION BY "Category" 
      ORDER BY "DayOfWeek")
FROM Samples."samples.dremio.com"."SF_incidents2016.json"

-- Category, Descript, DayOfWeek, EXPR$3
-- ARSON, ARSON, Friday, 1
-- ARSON, ARSON, Monday, 2