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: 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",
ROW_NUMBER()
OVER (
PARTITION BY "Category"
ORDER BY "DayOfWeek")
FROM eth.recent_blocks
-- Category, Descript, DayOfWeek, EXPR$3
-- ARSON, ARSON, Friday, 1
-- ARSON, ARSON, Friday, 2
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