COUNT
Function COUNT
is also found in the following categories: Window functions.
Syntax
Standard
Extended
COUNT( [ value ] )
COUNT( [ value ]
[ FIXED ... | INCLUDE ... | EXCLUDE ... ]
[ BEFORE FILTER BY ... ]
)
More info:
Description
Returns the number of items in the group.
Can be used with constants, such as COUNT(1)
or COUNT()
. If the chart does not use other measures and dimensions, the result of such an expression will always be 1
. This is because the function does not include any fields, so DataLens accesses no source tables in the query.
Argument types:
value
—Any
Return type: Integer
Examples
COUNT()
COUNT([OrderID])
Data source support
ClickHouse 21.8
, Microsoft SQL Server 2017 (14.0)
, MySQL 5.7
, Oracle Database 12c (12.1)
, PostgreSQL 9.3
, YDB
.