COUNT

    Function COUNT is also found in the following categories: Window functions.

    Syntax

    COUNT(  [ value ] )
    
    COUNT(  [ value ]
           [ FIXED ... | INCLUDE ... | EXCLUDE ... ]
           [ BEFORE FILTER BY ... ]
         )
    

    More info:

    Description

    Returns the number of items in the group.

    Argument types:

    • valueAny

    Return type: Integer

    Examples

    COUNT()
    
    COUNT([OrderID])
    

    Data source support

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