-- https://docs.oracle.com/en/database/oracle/oracle-database/23/sqlrf/Data-Types.html
INSERT INTO example VALUES (1, TRUE, NULL);
INSERT INTO example VALUES (2, FALSE, true);
INSERT INTO example VALUES (3, 0, 'off');
INSERT INTO example VALUES (4, 'no', 'yes');
INSERT INTO example VALUES (5, 'f', 't' );
INSERT INTO example VALUES (6, false, true);
INSERT INTO example VALUES (7, 'on', 'off');
INSERT INTO example VALUES (8, -3.14, 1);