Subtraction (-)
Syntax
value_1 - value_2
Description
Behaves differently depending on the argument types. Possible options are listed in the table:
Type of value_1 |
Type of value_2 |
Return value |
|---|---|---|
Fractional number | Integer |
Fractional number | Integer |
The difference between the numbers value_1 and value_2. |
Date |
Fractional number | Integer |
The date that is value_2 days smaller than value_1 (rounded down to an integer number of days). |
Datetime |
Fractional number | Integer |
The date with time, value_2 days smaller than value_1. If value_2 contains a fractional part, it is converted to hours (1/24), minutes (1/1440), and seconds (1/86400). |
Date |
Date |
The difference between two dates in days. |
Any |
Any |
The difference between two dates in days: the integer part — the number of whole days, the fractional part — the number of hours, minutes and seconds expressed as a fraction of the whole day (1 hour is '1/24'). |
Datetime |
Datetime |
The difference between two dates in days: the integer part — the number of whole days, the fractional part — the number of hours, minutes and seconds expressed as a fraction of the whole day (1 hour is '1/24'). |
Argument types:
value_1—Date | Datetime | Fractional number | Integervalue_2—Date | Datetime | Fractional number | Integer
Return type: Depends on argument types
Examples
2 - 3 = -1
2 - 0.5 = 1.5
#2019-01-06# - 2 = #2019-01-04#
#2019-01-06# - 2.2 = #2019-01-03#
#2019-01-06 03:00:00# - 2 = #2019-01-04 03:00:00#
#2019-01-06 03:00:00# - 2.5 = #2019-01-03 15:00:00#
#2019-01-06# - #2019-01-02# = 4
#2019-01-06 15:00:00# - #2019-01-02 03:00:00# = 4.5
Data source support
ClickHouse 21.8, Files, Google Sheets, Yandex Metrica, Microsoft SQL Server 2017 (14.0), MySQL 5.7, Oracle Database 12c (12.1), PostgreSQL 9.3, Yandex Documents, YDB.