PL/SQL - Optional conditions in where-clause - without dynamic sql?

Question

I have a query where not all conditions are necessary. Here\'s an example of what it looks like when all conditions are used:

select num
from (select distinct q.         


        

Answer 1

I would just do this

select num
from (select distinct q.num
       from cqqv q
       where q.bcode = '1234567' --this is variable
             and q.lb = 'AXCT' --this is variable
             and q.type = nvl(, q.type)  --this condition ignored because of "type=*" in input
             and q.edate > sysdate - 30 --this is variable
       order by dbms_random.value()) subq
where rownum <= 10; --this is variable

One only has to guarantee that the variable-type is null when the q.TYPE filtering is to be ignored.