Skip to main content
Version: 24.3.x

Categories: Window

ROW_NUMBER

Returns the row number for the current row based on the ORDER BY clause within each partition. Rows containing identical values receive different row numbers.

Syntax​

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

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

Examples

ROW_NUMBER example 
SELECT "Category", 
  "Descript", 
  "DayOfWeek",
  ROW_NUMBER() 
    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, Friday, 2