SQL: Can I negate a condition in a where clause?

Question

I want to check if a boolean is true, then decide in the WHERE clause what condition to use.

Say the boolean variable is @checkbool:

SELECT *
FROM Ta         


        

Answer 1

select *
from TableA A
where
    (@checkbool = 1 and A.Id = 123) or
    (@checkbool = 0 and A.Id <> 123)