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My use case was that I wanted to set a variable to a string. All the other answers here show how to set a variable using the output of a SELECT statement. Here's how to do it with a simple string: DECLARE @ModelID varchar(60) = 'Model T'
In order to assign a variable safely you have to use the SET-SELECT statement: SET @PrimaryContactKey = (SELECT c.PrimaryCntctKey FROM tarcustomer c, tarinvoice i WHERE i.custkey = c.custkey AND i.invckey = @tmp_key)
25 Νοε 2009 · SET and SELECT may be used to assign values to variables through T-SQL. Both fulfill the task, but in some scenarios unexpected results may be produced. In this tip I elaborate on the considerations for choosing between the SET and SELECT methods for assigning a value to variable.
8 Ιουλ 2024 · Set a value in a Transact-SQL variable. When a variable is first declared, its value is set to NULL. To assign a value to a variable, use the SET statement. This is the preferred method of assigning a value to a variable. A variable can also have a value assigned by being referenced in the select list of a SELECT statement.
29 Νοε 2017 · SQL Server provides us with two methods in T-SQL to assign a value to a previously created local SQL variable. The first method is the SET statement, the ANSI standard statement that is commonly used for variable value assignment. The second statement is the SELECT statement.
SELECT @local_variable is typically used to return a single value into the variable. However, when expression is the name of a column, it can return multiple values. If the SELECT statement returns more than one value, the variable is assigned the last value that is returned.
7 Μαρ 2021 · Learn how to use SQL variables in queries to make your SELECT statements accept a greater variety of conditions.
