RANK_UNIQUE (window)

Syntax

RANK_UNIQUE( value [ , direction ] [ TOTAL | WITHIN ... | AMONG ... ] [ BEFORE FILTER BY ... ] )

Description

Returns the rank of the current row if ordered by the given argument. Rows corresponding to the same value have different rank values. This means that rank values are sequential and different for all rows, always increasing by 1 for the next row.

If direction is "desc" or omitted, then ranking is done from greatest to least, if "asc", then from least to greatest.

See also RANK, RANK_DENSE, RANK_PERCENTILE.

Argument types:

• value — Boolean | Date | Datetime | Fractional number | Integer | String | UUID
• direction — String

Return type: Integer

Examples

RANK_UNIQUE([Profit])

RANK_UNIQUE([Profit] TOTAL)

RANK_UNIQUE([Profit] WITHIN [Country])

RANK_UNIQUE([Profit], "asc" AMONG [Date])

Data source support

Materialized Dataset, ClickHouse 1.1, Microsoft SQL Server 2017 (14.0), MySQL 5.6, Oracle Database 12c (12.1), PostgreSQL 9.3.