Addition and concatenation (+)
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 sum of the numbers value_1 and value_2. |
Date |
Fractional number | Integer |
The date that is value_2 days greater than value_1 (rounded down to an integer number of days). |
Datetime |
Fractional number | Integer |
The date with time, value_2 days greater than value_1. If value_2 contains a fractional part, it is converted hours (1/24), minutes (1/1440), and seconds (1/86400). |
String |
String |
The merging (concatenation) of strings value_1 and value_2. |
Array of fractional numbers | Array of integers | Array of strings |
Array of fractional numbers | Array of integers | Array of strings |
The merging (concatenation) of arrays value_1 and value_2. |
Changing the order of arguments does not affect the result.
Argument types:
value_1—Array of fractional numbers | Array of integers | Array of strings | Date | Datetime | Fractional number | Integer | Markup | Stringvalue_2—Array of fractional numbers | Array of integers | Array of strings | Date | Datetime | Fractional number | Integer | Markup | String
Return type: Depends on argument types
Examples
2 + 3 = 5
"Lorem" + " ipsum" = "Lorem ipsum"
#2019-01-06# + 2 = #2019-01-08#
2.2 + #2019-01-06# = #2019-01-08#
2 + #2019-01-06 03# = #2019-01-08 03:00:00#
#2019-01-06 03# + 2.5 = #2019-01-08 15:00:00#
Data source support
ClickHouse 19.13, Microsoft SQL Server 2017 (14.0), MySQL 5.6, PostgreSQL 9.3.