= (Assignment Operator) (Transact-SQL)
Applies to: SQL Server (all supported versions) Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)
The equal sign (=) is the only Transact-SQL assignment operator. In the following example, the
@MyCounter variable is created, and then the assignment operator sets
@MyCounter to a value returned by an expression.
DECLARE @MyCounter INT; SET @MyCounter = 1;
The assignment operator can also be used to establish the relationship between a column heading and the expression that defines the values for the column. The following example displays the column headings
SecondColumnHeading. The string
xyz is displayed in the
FirstColumnHeading column heading for all rows. Then, each product ID from the
Product table is listed in the
SecondColumnHeading column heading.
-- Uses AdventureWorks SELECT FirstColumnHeading = 'xyz', SecondColumnHeading = ProductID FROM Production.Product; GO
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