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

You can use IN clausule or even the != operator, like:

A.Id NOT IN (123,x,y,z);

or

A.Id != 123;