RANK_UNIQUE (window)

    Syntax

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

    More info:

    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:

    • valueBoolean | Date | Datetime | Fractional number | Integer | String | UUID
    • directionString

    Return type: Integer

    Note

    Only constant values are accepted for the arguments (direction).

    Examples

    Example with two arguments

    Source data

    Date City Category Orders Profit
    '2019-03-01' 'London' 'Office Supplies' 8 120.80
    '2019-03-04' 'London' 'Office Supplies' 2 100.00
    '2019-03-05' 'London' 'Furniture' 1 750.00
    '2019-03-02' 'Moscow' 'Furniture' 2 1250.50
    '2019-03-03' 'Moscow' 'Office Supplies' 4 85.00
    '2019-03-01' 'San Francisco' 'Office Supplies' 23 723.00
    '2019-03-01' 'San Francisco' 'Furniture' 1 1000.00
    '2019-03-03' 'San Francisco' 'Furniture' 4 4000.00
    '2019-03-02' 'Detroit' 'Furniture' 5 3700.00
    '2019-03-04' 'Detroit' 'Office Supplies' 25 1200.00
    '2019-03-04' 'Detroit' 'Furniture' 2 3500.00

    Grouped by [City].

    Sorted by [City].

    Result

    [City] SUM([Orders]) RANK_UNIQUE(SUM([Orders]), "desc") RANK_UNIQUE(SUM([Orders]), "asc")
    'Detroit' 32 1 4
    'London' 11 3 2
    'Moscow' 6 4 1
    'San Francisco' 28 2 3
    Example with grouping

    Source data

    Date City Category Orders Profit
    '2019-03-01' 'London' 'Office Supplies' 8 120.80
    '2019-03-04' 'London' 'Office Supplies' 2 100.00
    '2019-03-05' 'London' 'Furniture' 1 750.00
    '2019-03-02' 'Moscow' 'Furniture' 2 1250.50
    '2019-03-03' 'Moscow' 'Office Supplies' 4 85.00
    '2019-03-01' 'San Francisco' 'Office Supplies' 23 723.00
    '2019-03-01' 'San Francisco' 'Furniture' 1 1000.00
    '2019-03-03' 'San Francisco' 'Furniture' 4 4000.00
    '2019-03-02' 'Detroit' 'Furniture' 5 3700.00
    '2019-03-04' 'Detroit' 'Office Supplies' 25 1200.00
    '2019-03-04' 'Detroit' 'Furniture' 2 3500.00

    Grouped by [City], [Category].

    Sorted by [City], [Category].

    Result

    [City] [Category] SUM([Orders]) RANK_UNIQUE(SUM([Orders]) TOTAL) RANK_UNIQUE(SUM([Orders]) WITHIN [City]) RANK_UNIQUE(SUM([Orders]) AMONG [City])
    'Detroit' 'Furniture' 7 4 2 1
    'Detroit' 'Office Supplies' 25 1 1 1
    'London' 'Furniture' 1 8 2 4
    'London' 'Office Supplies' 10 3 1 3
    'Moscow' 'Furniture' 2 7 2 3
    'Moscow' 'Office Supplies' 4 6 1 4
    'San Francisco' 'Furniture' 5 5 2 2
    'San Francisco' 'Office Supplies' 23 2 1 2

    Data source support

    ClickHouse 19.13, Microsoft SQL Server 2017 (14.0), MySQL 5.6, PostgreSQL 9.3.