TOP_CONCAT

SyntaxSyntax

TOP_CONCAT( expression, amount [ , separator ] )

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

DescriptionDescription

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:

• expression — Array of fractional numbers | Array of integers | Array of strings | Boolean | Date | Datetime | Fractional number | Geopoint | Geopolygon | Integer | String | UUID
• amount — Integer
• separator — String

Return type: String

ExamplesExamples

TOP_CONCAT([Profit], 3)

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

Data source supportData source support

ClickHouse 21.8, YDB.