TOP_CONCAT

Syntax

TOP_CONCAT( expression, amount [ , separator ] )
TOP_CONCAT( expression, amount [ , separator ]
            [ FIXED ... | INCLUDE ... | EXCLUDE ... ]
            [ BEFORE FILTER BY ... ]
          )

More info:

Description

Returns a string that contains top amount unique values of expression delimited by separator (if separator is not specified, a comma is used).

Argument types:

  • expressionArray of fractional numbers | Array of integers | Array of strings | Boolean | Date | Datetime | Fractional number | Geopoint | Geopolygon | Integer | String | UUID
  • amountInteger
  • separatorString

Return type: String

Note

Only constant values are accepted for the arguments (amount, separator).

Examples

TOP_CONCAT([Profit], 3)
TOP_CONCAT([Profit], 3, '; ')

Data source support

ClickHouse 21.8, YDB.

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