How do I use variables in Oracle SQL Developer?

Question

Below is an example of using variables in SQL Server 2000.

DECLARE @EmpIDVar INT

SET @EmpIDVar = 1234

SELECT *
FROM Employees
WHERE EmployeeID = @EmpIDVar

I want to do the exact same thing in Oracle using SQL Developer without additional complexity. It seems like a very simple thing to do, but I can't find a simple solution. How can I do it?

Answer 1

I am using the SQL-Developer in Version 3.2. The other stuff didn't work for me, but this did:

define value1 = 'sysdate'

SELECT &&value1 from dual;

Also it's the slickest way presented here, yet.

(If you omit the "define"-part you'll be prompted for that value)