An IN condition is single value again a list of values. It returns TRUE, if the specified value is in the list. Otherwise, it returns FALSE.

Some examples are given in the tutorial exercise below:

SELECT 3 IN (1,2,3,4,5) FROM DUAL;

1

SELECT 3 NOT IN (1,2,3,4,5) FROM DUAL;

0

SELECT 'Y' IN ('F','Y','I') FROM DUAL;

1