Use of % for wildcard matching in cursor

Question

i can use the wildcard character('%') in a statement something like this :-
where city like nvl(cit,'%') in which if the null value is encountered in the variable 'cit', then city could be anything.
Now, my question is can i use this wildcard character('%') in a between condition like:
where serial_no between nvl(from_serial,'%') and nvl(to_serial,'%')
I guess we cannot use the wildcard character('%') in a between condition like we can in a 'like' statement. So, how do i use the wildcard character('%') in a between statement. Please help in resolving the problem.

Answer 1

Jatin
You are correct, wildcards only work with LIKE.
How you write your where clause depends on what datatype is involved. Assuming serial_no is numeric:
where serial_no between
nvl(from_serial,serial_no-1) and
nvl(to_serial,serial_no+1)
OR you could do it more explicitly
where (from_serial is null
or serial_no >= from_serial)
and (to_serial is null
or serial_no <= to_serial)