-- create a table
CREATE TABLE students (
  id INTEGER PRIMARY KEY,
  name TEXT NOT NULL,
  gender TEXT NOT NULL
);
-- insert some values
INSERT INTO students VALUES (0, 'Felipe', 'M');
INSERT INTO students VALUES (1, 'Ryan', 'M');
INSERT INTO students VALUES (2, 'Joanna', 'F');
-- fetch some values
-- SELECT * FROM students WHERE gender = 'F';
SELECT CASE when (id isnull or id = 0) THEN 'FALSE' ELSE 'TRUE' END BooleanOutput FROM students;