Is there a ternary conditional operator in T-SQL?

Question

What are alternatives to implement the following query:

select *  
from table  
where isExternal = @type = 2 ? 1 : 0

Answer 1

In SQL Server 2012, you could use the IIF function:

SELECT *
FROM table
WHERE isExternal = IIF(@type = 2, 1, 0)

Also note: in T-SQL, the assignment (and comparison) operator is just = (and not == - that's C#)

Answer 2

Use case:

select *
from table
where isExternal = case @type when 2 then 1 else 0 end