Oracle's lack of a Bit datatype for table columns

Question

Oracle does not support a bit datatype or any other type for true/false scenarios. Does one use the char(1) field instead by using a specific letter to

Answer 1

Use a CHAR(1), and a constraint to allow only 1 and 0.

...

col CHAR(1),
CONSTRAINT cons_atable_col1 CHECK (col1 IN ('1','0'))