+ (Addition) (Transact-SQL)
Applies to: SQL Server (all supported versions) Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)
Adds two numbers. This addition arithmetic operator can also add a number, in days, to a date.
expression + expression
To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation.
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).
A. Using the addition operator to calculate the total number of hours away from work for each employee.
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
B. Using the addition operator to add days to date and time values
This example adds a number of days to a
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)
C. Adding character and integer data types
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)
Examples: Azure Synapse Analytics and Analytics Platform System (PDW)
D: Using the addition operator to calculate the total number of hours away from work for each employee
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;
Compound Operators (Transact-SQL)
+= (Addition Assignment) (Transact-SQL)
CAST and CONVERT (Transact-SQL)
Data Type Conversion (Database Engine)
Data Types (Transact-SQL)
Built-in Functions (Transact-SQL)
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