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ROW_NUMBER

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