+ (Add) (Transact-SQL)

+ (Add) (Transact-SQL)

 

THIS TOPIC APPLIES TO: yesSQL Server (starting with 2008) yesAzure SQL Database yesAzure SQL Data Warehouse yesParallel Data Warehouse

Adds two numbers. This addition arithmetic operator can also add a number, in days, to a date.

Topic link icon Transact-SQL Syntax Conventions


expression + expression
-- Azure SQL Data Warehouse and Parallel Data Warehouse
      expression 
      +
      expression

expression

Is any valid expression of any one of the data types in the numeric category except the bit data type. Cannot be used with date, time, datetime2, or datetimeoffset data types.

Returns the data type of the argument with the higher precedence. For more information, see Data Type Precedence (Transact-SQL).

This example finds the total number of hours away from work for each employee by adding the number of hours taken for vacation and the number of hours taken as sick leave.

-- Uses AdventureWorks

SELECT p.FirstName, p.LastName, VacationHours, SickLeaveHours, 
    VacationHours + SickLeaveHours AS 'Total Hours Away'
FROM HumanResources.Employee AS e
    JOIN Person.Person AS p ON e.BusinessEntityID = p.BusinessEntityID
ORDER BY 'Total Hours Away' ASC;
GO

This example adds a number of days to a datetime date.


SET NOCOUNT ON
DECLARE @startdate datetime, @adddays int;
SET @startdate = ''January 10, 1900 12:00 AM';
SET @adddays = 5;
SET NOCOUNT OFF;
SELECT @startdate + 1.25 AS 'Start Date', 
   @startdate + @adddays AS 'Add Date';

Here is the result set.

Start Date Add Date

--------------------------- ---------------------------

1900-01-11 06:00:00.000 1900-01-15 00:00:00.000

(1 row(s) affected)

The following example adds an int data type value and a character value by converting the character data type to int. If a character that is not valid exists in the char string, the Transact-SQL returns an error.

DECLARE @addvalue int;
SET @addvalue = 15;
SELECT '125127' + @addvalue;

Here is the result set.

-----------------------

125142

(1 row(s) affected)

The following example finds the total number of hours away from work for each employee by adding the number of hours taken for vacation and the number of hours taken as sick leave and sorts the results in ascending order.

-- Uses AdventureWorks

SELECT FirstName, LastName, VacationHours, SickLeaveHours, 
    VacationHours + SickLeaveHours AS TotalHoursAway
FROM DimEmployee
ORDER BY TotalHoursAway ASC;

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