# 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_1Date | Datetime | Fractional number | Integer
• value_2Date | 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 19.13, Microsoft SQL Server 2017 (14.0), MySQL 5.6, PostgreSQL 9.3.